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Vulnerability from cleanstart
Published
2026-08-13 12:10
Modified
2026-08-14 05:56
Summary
Security fixes in confluent-kafka 8.3.0-r1
Details
Package confluent-kafka version 8.3.0-r1 fixes 14 vulnerabilities: CVE-2026-54512, CVE-2026-54513, CVE-2026-54514, CVE-2026-54516, CVE-2026-54517...
References
| URL | Type | |
|---|---|---|
{
"affected": [
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"name": "confluent-kafka"
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"id": "CLEANSTART-2026-KQ29054",
"modified": "2026-08-14T05:56:37Z",
"published": "2026-08-13T12:10:09Z",
"references": [
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"url": "https://github.com/confluentinc/kafka"
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"CVE-2026-54514",
"CVE-2026-54516",
"CVE-2026-54517",
"CVE-2026-54518",
"ghsa-rmj7-2vxq-3g9f",
"ghsa-j3rv-43j4-c7qm",
"ghsa-9fxm-vc8v-hj55",
"ghsa-5hh8-q8hv-fr38",
"ghsa-rcqc-6cw3-h962",
"ghsa-hgj6-7826-r7m5",
"ghsa-2r2c-cx56-8933",
"ghsa-47qp-hqvx-6r3f"
]
}
CVE-2026-54512 (GCVE-0-2026-54512)
Vulnerability from cvelistv5 – Published: 2026-06-23 20:56 – Updated: 2026-06-24 15:22
VLAI
EPSS
VEX
Title
jackson-databind: PolymorphicTypeValidator bypass via generic type parameters allows arbitrary class instantiation
Summary
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.10.0 until 2.18.8, 2.21.4, and 3.1.4, jackson-databind's PolymorphicTypeValidator (PTV) is the primary safety mechanism guarding polymorphic deserialization. When polymorphic typing is enabled and a type identifier contains generic parameters (i.e. the type ID string contains <), DatabindContext._resolveAndValidateGeneric() validates only the raw container class name (the substring before <) against the configured PTV. If the container type is approved, the method parses the full canonical type string via TypeFactory.constructFromCanonical() and returns the fully parameterized type without ever validating the nested type arguments against the PTV. The nested type arguments are then resolved, instantiated, and populated as beans during deserialization. An attacker who controls the type ID can therefore place a denied class as a generic type parameter of an allowed container — for example java.util.ArrayList<com.evil.Gadget> when only java.util.ArrayList is allow-listed. The container passes the PTV check; com.evil.Gadget is loaded via Class.forName(name, true, loader), instantiated, and its properties are set from attacker-controlled JSON. This completely bypasses an explicitly configured PTV allow-list. This vulnerability is fixed in 2.18.8, 2.21.4, and 3.1.4.
Severity
8.1 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-24 14:54 UTC
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/FasterXML/jackson-databind/sec… | x_refsource_CONFIRM |
| https://github.com/FasterXML/jackson-databind/iss… | x_refsource_MISC |
| https://github.com/FasterXML/jackson-databind/com… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| FasterXML | jackson-databind |
Affected:
>= 2.10.0, < 2.18.8
Affected: >= 2.19.0, < 2.21.4 Affected: >= 3.0.0, < 3.1.4 |
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CVE-2026-54513 (GCVE-0-2026-54513)
Vulnerability from cvelistv5 – Published: 2026-06-23 20:53 – Updated: 2026-08-14 12:04
VLAI
EPSS
VEX
Title
jackson-databind: Array subtype allowlist bypass in BasicPolymorphicTypeValidator (allowIfSubTypeIsArray)
Summary
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.10.0 until 2.18.8, 2.21.4, and 3.1.4, BasicPolymorphicTypeValidator.Builder.allowIfSubTypeIsArray() allowlists any array type based only on clazz.isArray(), without validating the array's component (element) type against the configured allowlist. A PTV built with allowIfSubTypeIsArray() plus an explicit concrete-type allowlist therefore still permits EvilType[] even though EvilType is not allowlisted. When Jackson deserializes the elements and no per-element type IDs are present, it instantiates the component type directly with no further PTV check, bypassing the allowlist. This vulnerability is fixed in 2.18.8, 2.21.4, and 3.1.4.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-24 14:45 UTC
CWE
- CWE-184 - Incomplete List of Disallowed Inputs
Assigner
References
29 references
Impacted products
52 products
| Vendor | Product | Version | |
|---|---|---|---|
| FasterXML | jackson-databind |
Affected:
>= 2.10.0, < 2.18.8
Affected: >= 2.19.0, < 2.21.4 Affected: >= 3.0.0, < 3.1.4 |
|
| Red Hat | Cryostat 4 on RHEL 9 |
Unaffected:
4.2.0-13 , < *
(rpm)
cpe:/a:redhat:cryostat:4::el9 |
|
| Red Hat | Red Hat build of Apache Camel 4.18.3 for Spring Boot 3.5.16 |
cpe:/a:redhat:apache_camel_spring_boot:4.18 |
|
| Red Hat | Red Hat Build of Apache Camel 4.18 for Quarkus 3.33 |
cpe:/a:redhat:apache_camel_quarkus:3.33 |
|
| Red Hat | Red Hat build of Keycloak 26.4 |
Unaffected:
26.4.14-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.4::el9 |
|
| Red Hat | Red Hat build of Keycloak 26.4 |
Unaffected:
26.4-22 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.4::el9 |
|
| Red Hat | Red Hat build of Keycloak 26.4.14 |
cpe:/a:redhat:build_keycloak:26.4::el9 |
|
| Red Hat | Red Hat build of Keycloak 26.4.14 |
Unaffected:
rhel9-operator , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.4::el9 |
|
| Red Hat | Red Hat build of Keycloak 26.4.14 |
Unaffected:
openshift-rhel9 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.4::el9 |
|
| Red Hat | Red Hat build of Keycloak 26.6 |
Unaffected:
26.6.5-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.6::el9 |
|
| Red Hat | Red Hat build of Keycloak 26.6 |
Unaffected:
26.6-11 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.6::el9 |
|
| Red Hat | Red Hat build of Keycloak 26.6.5 |
cpe:/a:redhat:build_keycloak:26.6::el9 |
|
| Red Hat | Red Hat build of Keycloak 26.6.5 |
Unaffected:
rhel9-operator , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.6::el9 |
|
| Red Hat | Red Hat build of Keycloak 26.6.5 |
Unaffected:
openshift-rhel9 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.6::el9 |
|
| Red Hat | Red Hat Certificate System 10.8 for RHEL-8 |
Unaffected:
8100020260728001635.f9354743 , < *
(rpm)
cpe:/a:redhat:certificate_system:10.8::el8 |
|
| Red Hat | Red Hat Data Grid 8.6.2 |
cpe:/a:redhat:jboss_data_grid:8 |
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:11.9.0-4.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support |
Unaffected:
0:11.6.0-2.el10_0 , < *
(rpm)
cpe:/o:redhat:enterprise_linux_eus:10.0 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
8100020260714102233.489197e6 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support |
Unaffected:
8040020260720064222.522a0ee4 , < *
(rpm)
cpe:/a:redhat:rhel_aus:8.4 |
|
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On |
Unaffected:
8040020260720064222.522a0ee4 , < *
(rpm)
cpe:/a:redhat:rhel_eus_long_life:8.4 |
|
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support |
Unaffected:
8060020260720025549.ad008a3a , < *
(rpm)
cpe:/a:redhat:rhel_aus:8.6 |
|
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On |
Unaffected:
8060020260720025549.ad008a3a , < *
(rpm)
cpe:/a:redhat:rhel_eus_long_life:8.6 |
|
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service |
Unaffected:
8080020260714161755.63b34585 , < *
(rpm)
cpe:/a:redhat:rhel_tus:8.8 |
|
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions |
Unaffected:
8080020260714161755.63b34585 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:8.8 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:2.21.4-1.el9_8 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions |
Unaffected:
0:2.21.4-1.el9_2 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.2 |
|
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions |
Unaffected:
0:2.21.4-1.el9_4 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.4 |
|
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support |
Unaffected:
0:2.21.4-1.el9_6 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.6 |
|
| Red Hat | Streams for Apache Kafka 3.2.1 |
cpe:/a:redhat:amq_streams:3.2::el9 |
|
| Red Hat | OpenShift Developer Tools and Services |
cpe:/a:redhat:ocp_tools |
|
| Red Hat | OpenShift Serverless |
cpe:/a:redhat:serverless:1 |
|
| Red Hat | Red Hat AI Inference Server |
cpe:/a:redhat:ai_inference_server:3 |
|
| Red Hat | Red Hat AMQ Broker 7 |
cpe:/a:redhat:amq_broker:7 |
|
| Red Hat | Red Hat AMQ Clients |
cpe:/a:redhat:amq_clients:2023 |
|
| Red Hat | Red Hat Ansible Automation Platform 2 |
cpe:/a:redhat:ansible_automation_platform:2 |
|
| Red Hat | Red Hat build of Apache Camel 4 for Quarkus 3 |
cpe:/a:redhat:camel_quarkus:3 |
|
| Red Hat | Red Hat build of Apache Camel - HawtIO 4 |
cpe:/a:redhat:apache_camel_hawtio:4 |
|
| Red Hat | Red Hat build of Apicurio Registry 3 |
cpe:/a:redhat:apicurio_registry:3 |
|
| Red Hat | Red Hat build of Debezium 3 |
cpe:/a:redhat:debezium:3 |
|
| Red Hat | Red Hat build of Quarkus |
cpe:/a:redhat:quarkus:3 |
|
| Red Hat | Red Hat Enterprise Linux AI (RHEL AI) 3 |
cpe:/a:redhat:enterprise_linux_ai:3 |
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 7 |
cpe:/a:redhat:jboss_enterprise_application_platform:7 |
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 8 |
cpe:/a:redhat:jboss_enterprise_application_platform:8 |
|
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack |
cpe:/a:redhat:jbosseapxp |
|
| Red Hat | Red Hat Lightspeed for Runtimes Operator |
cpe:/a:redhat:lightspeed_for_runtimes:1 |
|
| Red Hat | Red Hat Offline Knowledge Portal |
cpe:/a:redhat:offline_knowledge_portal:1 |
|
| Red Hat | Red Hat OpenShift AI (RHOAI) |
cpe:/a:redhat:openshift_ai |
|
| Red Hat | Red Hat OpenShift Dev Spaces |
cpe:/a:redhat:openshift_devspaces:3 |
|
| Red Hat | Red Hat Satellite 6 |
cpe:/a:redhat:satellite:6 |
|
| Red Hat | Red Hat Single Sign-On 7 |
cpe:/a:redhat:red_hat_single_sign_on:7 |
|
| Red Hat | streams for Apache Kafka 2 |
cpe:/a:redhat:amq_streams:2 |
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CVE-2026-54514 (GCVE-0-2026-54514)
Vulnerability from cvelistv5 – Published: 2026-06-23 20:51 – Updated: 2026-06-25 12:59
VLAI
EPSS
VEX
Title
jackson-databind: InetSocketAddress deserialization triggers eager DNS resolution (SSRF)
Summary
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.0.0 until 2.18.8, 2.21.4, and 3.1.4, JDKFromStringDeserializer constructed InetSocketAddress with new InetSocketAddress(host, port), which performs eager DNS name resolution for hostname inputs at deserialization time. An application that binds untrusted JSON into a type containing an InetSocketAddress field issues an attacker-chosen DNS query during readValue, before any application-level validation or connect logic. The fix uses InetSocketAddress.createUnresolved(host, port), deferring DNS to an explicit connect. This vulnerability is fixed in 2.18.8, 2.21.4, and 3.1.4.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-25 12:59 UTC
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/FasterXML/jackson-databind/sec… | x_refsource_CONFIRM |
| https://github.com/FasterXML/jackson-databind/pull/5951 | x_refsource_MISC |
| https://github.com/FasterXML/jackson-databind/com… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| FasterXML | jackson-databind |
Affected:
>= 2.0.0, < 2.18.8
Affected: >= 2.19.0, < 2.21.4 Affected: >= 3.0.0, < 3.1.4 |
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CVE-2026-54516 (GCVE-0-2026-54516)
Vulnerability from cvelistv5 – Published: 2026-06-23 20:48 – Updated: 2026-06-24 13:00
VLAI
EPSS
VEX
Title
jackson-databind: Renamed @JsonIgnore'd setters can deserialize via private fields
Summary
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.21.0 until 2.21.4 and 3.1.4, POJOPropertiesCollector._renameProperties() allows a property with @JsonProperty("renamed") on the getter and @JsonIgnore on the setter to be renamed rather than dropped. With MapperFeature.INFER_PROPERTY_MUTATORS enabled (default), the private backing field is retained; during deserialization BeanDeserializerFactory.addBeanProps() sees hasField()==true, builds a FieldProperty, and makes the backing field writable. An attacker supplying the renamed JSON key writes the backing field directly, bypassing the @JsonIgnore on the setter. This vulnerability is fixed in 3.1.4.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-24 13:00 UTC
CWE
- CWE-915 - Improperly Controlled Modification of Dynamically-Determined Object Attributes
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/FasterXML/jackson-databind/sec… | x_refsource_CONFIRM |
| https://github.com/FasterXML/jackson-databind/pull/5967 | x_refsource_MISC |
| https://github.com/FasterXML/jackson-databind/pull/5968 | x_refsource_MISC |
| https://github.com/FasterXML/jackson-databind/com… | x_refsource_MISC |
| https://github.com/FasterXML/jackson-databind/com… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
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| FasterXML | jackson-databind |
Affected:
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CVE-2026-54517 (GCVE-0-2026-54517)
Vulnerability from cvelistv5 – Published: 2026-06-23 20:47 – Updated: 2026-06-24 19:13
VLAI
EPSS
VEX
Title
jackson-databind: @JsonView bypass for setterless creator properties
Summary
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.21.0 until 2.21.4 and 3.1.4, in BeanDeserializer._deserializeUsingPropertyBased, the active-view (@JsonView) filter was applied only to creator properties; the regular property-buffering branch performed no prop.visibleInView(activeView) check. A change making SetterlessProperty.isMerging() return true routed setterless Collection/Map properties through this unguarded path, so a setterless collection annotated with a restricted @JsonView is populated from attacker JSON even when the active view excludes it. This vulnerability is fixed in 2.21.4 and 3.1.4.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-24 19:13 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/FasterXML/jackson-databind/sec… | x_refsource_CONFIRM |
| https://github.com/FasterXML/jackson-databind/pull/5969 | x_refsource_MISC |
| https://github.com/FasterXML/jackson-databind/pull/5970 | x_refsource_MISC |
| https://github.com/FasterXML/jackson-databind/com… | x_refsource_MISC |
| https://github.com/FasterXML/jackson-databind/com… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
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Affected:
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"discovery": "UNKNOWN"
},
"title": "jackson-databind: @JsonView bypass for setterless creator properties"
}
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"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-54517",
"datePublished": "2026-06-23T20:47:22.977Z",
"dateReserved": "2026-06-15T18:40:01.650Z",
"dateUpdated": "2026-06-24T19:13:32.607Z",
"state": "PUBLISHED"
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CVE-2026-54518 (GCVE-0-2026-54518)
Vulnerability from cvelistv5 – Published: 2026-06-23 21:02 – Updated: 2026-06-24 15:32
VLAI
EPSS
VEX
Title
jackson-databind: @JsonView bypass for unwrapped creator parameters in jackson-databind
Summary
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.21.0 until 2.21.4 and 3.1.4, UnwrappedPropertyHandler.processUnwrappedCreatorProperties() replays buffered JSON into creator parameters but never consults prop.visibleInView(activeView). The normal property-based creator path gates creator properties on the active view, but this unwrapped-creator replay path bypasses that check, so a constructor parameter annotated with both @JsonView(AdminView.class) and @JsonUnwrapped is populated from attacker JSON even when a more restrictive view is active. This vulnerability is fixed in 2.21.4 and 3.1.4.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-24 15:25 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/FasterXML/jackson-databind/sec… | x_refsource_CONFIRM |
| https://github.com/FasterXML/jackson-databind/pull/5971 | x_refsource_MISC |
| https://github.com/FasterXML/jackson-databind/pull/5973 | x_refsource_MISC |
| https://github.com/FasterXML/jackson-databind/com… | x_refsource_MISC |
| https://github.com/FasterXML/jackson-databind/com… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| FasterXML | jackson-databind |
Affected:
>= 2.21.0, < 2.21.4
Affected: >= 3.0.0, < 3.1.4 |
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GHSA-2R2C-CX56-8933
Vulnerability from github – Published: 2026-06-18 13:07 – Updated: 2026-07-20 21:21
VLAI
Summary
JLine3 Telnet server: Unauthenticated Remote DoS via Unbounded Telnet NAWS Terminal Geometry
Details
Summary
The JLine3 Telnet server (remote-telnet module) does not apply an upper bound to
terminal dimensions received via the Telnet NAWS (Negotiate About Window Size) option.
An unauthenticated remote attacker can send a NAWS subnegotiation advertising a
65535×65535 terminal and repeatedly alternate values to trigger continuous, expensive
rendering work on the server, causing CPU exhaustion and denial of service.
Details
TelnetIO.handleNAWS() (TelnetIO.java:856-879) reads the client-supplied width and
height as 16-bit unsigned integers and passes them to setTerminalGeometry():
// TelnetIO.java:869-875
private void setTerminalGeometry(int columns, int rows) {
if (columns < SMALLEST_BELIEVABLE_WIDTH) columns = DEFAULT_WIDTH; // lower bound only
if (rows < SMALLEST_BELIEVABLE_HEIGHT) rows = DEFAULT_HEIGHT;
connectionData.setTerminalGeometry(columns, rows);
connection.processConnectionEvent(
new ConnectionEvent(connection, ConnectionEvent.Type.CONNECTION_TERMINAL_GEOMETRY_CHANGED));
}
Only a lower bound is enforced (minimum 20 columns / 6 rows). Values up to 65535 are accepted and stored. The geometry change event propagates to Telnet.java:153-158 where it calls:
terminal.setSize(new Size(65535, 65535));
terminal.raise(Signal.WINCH);
The WINCH signal triggers LineReaderImpl.handleSignal() → redisplay(). Inside
redisplay(), multiple paths iterate up to size.getColumns() times:
freshLine()(LineReaderImpl.java:937,953): loopssize.getColumns()-1= 65534 iterations, building and writing a space-padding string across the network socket.columnSplitLength(terminal, size.getColumns(), ...): called multiple times, each processing all characters against the 65535-wide line width.
Because WINCH only fires on change, the attacker alternates between two large values (e.g., 65535 and 65534) to trigger an unlimited stream of expensive render cycles. No authentication is required; the NAWS option is negotiated before any login sequence.
Affected source files:
- remote-telnet/src/main/java/org/jline/builtins/telnet/TelnetIO.java lines 856-879
- remote-telnet/src/main/java/org/jline/builtins/telnet/Telnet.java lines 140-175
- reader/src/main/java/org/jline/reader/impl/LineReaderImpl.java lines 929-962, 1293-1313
PoC
Send the following two raw Telnet packets in a loop to a running JLine Telnet server. No login or authentication is required.
Packet 1 — NAWS 65535 × 65535: FF FA 1F FF FF FF FF FF F0 (IAC SB NAWS 0xFF 0xFF 0xFF 0xFF IAC SE)
Packet 2 — NAWS 65534 × 65534: FF FA 1F FF FE FF FE FF F0 (IAC SB NAWS 0xFF 0xFE 0xFF 0xFE IAC SE)
Sending these alternately at ~10 packets/second is sufficient to peg one CPU core on the server. The server remains in this state for as long as the connection is open.
Reproduction environment:
- JLine3 built from current master on x86_64 Linux, OpenJDK 25.0.2
- remote-telnet module started with its default Telnet server configuration
- Test confirmed by source-code analysis and tracing the call chain at runtime
Impact
Type: Denial of Service (CPU exhaustion)
Who is affected: Any application that embeds the JLine3 remote-telnet module and
exposes its Telnet server on a network interface. The attacker requires no credentials.
A single connection making ~10 alternating NAWS packets per second fully occupies the
connection-handling thread and produces continuous I/O on the server's output stream.
Because connection threads are re-used for the life of the session, one attacker per
available connection slot can deny service to all users of that slot.
Credits
This issue was identified by Michał Majchrowicz and Marcin Wyczechowski, members of the AFINE Team.
Severity
7.5 (High)
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "org.jline:jline-remote-telnet"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.2.1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-56741"
],
"database_specific": {
"cwe_ids": [
"CWE-400"
],
"github_reviewed": true,
"github_reviewed_at": "2026-06-18T13:07:16Z",
"nvd_published_at": "2026-07-17T22:17:57Z",
"severity": "HIGH"
},
"details": "### Summary\n\nThe JLine3 Telnet server (`remote-telnet` module) does not apply an upper bound to\nterminal dimensions received via the Telnet NAWS (Negotiate About Window Size) option.\nAn unauthenticated remote attacker can send a NAWS subnegotiation advertising a\n65535\u00d765535 terminal and repeatedly alternate values to trigger continuous, expensive\nrendering work on the server, causing CPU exhaustion and denial of service.\n\n### Details\n\n`TelnetIO.handleNAWS()` (TelnetIO.java:856-879) reads the client-supplied width and\nheight as 16-bit unsigned integers and passes them to `setTerminalGeometry()`:\n\n```java\n// TelnetIO.java:869-875\nprivate void setTerminalGeometry(int columns, int rows) {\n if (columns \u003c SMALLEST_BELIEVABLE_WIDTH) columns = DEFAULT_WIDTH; // lower bound only\n if (rows \u003c SMALLEST_BELIEVABLE_HEIGHT) rows = DEFAULT_HEIGHT;\n connectionData.setTerminalGeometry(columns, rows);\n connection.processConnectionEvent(\n new ConnectionEvent(connection, ConnectionEvent.Type.CONNECTION_TERMINAL_GEOMETRY_CHANGED));\n}\n```\n\nOnly a *lower* bound is enforced (minimum 20 columns / 6 rows). Values up to 65535 are\naccepted and stored. The geometry change event propagates to Telnet.java:153-158 where\nit calls:\n\n terminal.setSize(new Size(65535, 65535));\n terminal.raise(Signal.WINCH);\n\nThe WINCH signal triggers `LineReaderImpl.handleSignal()` \u2192 `redisplay()`. Inside\n`redisplay()`, multiple paths iterate up to `size.getColumns()` times:\n\n- `freshLine()` (LineReaderImpl.java:937,953): loops `size.getColumns()-1` = **65534\n iterations**, building and writing a space-padding string across the network socket.\n- `columnSplitLength(terminal, size.getColumns(), ...)`: called multiple times,\n each processing all characters against the 65535-wide line width.\n\nBecause WINCH only fires on *change*, the attacker alternates between two large values\n(e.g., 65535 and 65534) to trigger an unlimited stream of expensive render cycles.\nNo authentication is required; the NAWS option is negotiated before any login sequence.\n\nAffected source files:\n- `remote-telnet/src/main/java/org/jline/builtins/telnet/TelnetIO.java` lines 856-879\n- `remote-telnet/src/main/java/org/jline/builtins/telnet/Telnet.java` lines 140-175\n- `reader/src/main/java/org/jline/reader/impl/LineReaderImpl.java` lines 929-962, 1293-1313\n\n### PoC\n\nSend the following two raw Telnet packets in a loop to a running JLine Telnet server.\nNo login or authentication is required.\n\nPacket 1 \u2014 NAWS 65535 \u00d7 65535:\n FF FA 1F FF FF FF FF FF F0\n (IAC SB NAWS 0xFF 0xFF 0xFF 0xFF IAC SE)\n\nPacket 2 \u2014 NAWS 65534 \u00d7 65534:\n FF FA 1F FF FE FF FE FF F0\n (IAC SB NAWS 0xFF 0xFE 0xFF 0xFE IAC SE)\n\nSending these alternately at ~10 packets/second is sufficient to peg one CPU core on\nthe server. The server remains in this state for as long as the connection is open.\n\nReproduction environment:\n- JLine3 built from current master on x86_64 Linux, OpenJDK 25.0.2\n- `remote-telnet` module started with its default `Telnet` server configuration\n- Test confirmed by source-code analysis and tracing the call chain at runtime\n\n### Impact\n\n**Type**: Denial of Service (CPU exhaustion)\n**Who is affected**: Any application that embeds the JLine3 `remote-telnet` module and\nexposes its Telnet server on a network interface. The attacker requires no credentials.\nA single connection making ~10 alternating NAWS packets per second fully occupies the\nconnection-handling thread and produces continuous I/O on the server\u0027s output stream.\nBecause connection threads are re-used for the life of the session, one attacker per\navailable connection slot can deny service to all users of that slot.\n\n### Credits\nThis issue was identified by Micha\u0142 Majchrowicz and Marcin Wyczechowski, members of the AFINE Team.",
"id": "GHSA-2r2c-cx56-8933",
"modified": "2026-07-20T21:21:51Z",
"published": "2026-06-18T13:07:16Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/jline/jline3/security/advisories/GHSA-2r2c-cx56-8933"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56741"
},
{
"type": "WEB",
"url": "https://github.com/jline/jline3/pull/2000"
},
{
"type": "WEB",
"url": "https://github.com/jline/jline3/commit/3ea9cad8699714dc072fade29d36be0d1e23d708"
},
{
"type": "WEB",
"url": "https://github.com/jline/jline3/commit/733eb353dca7b0ea0252e724445b6defa29c393e"
},
{
"type": "WEB",
"url": "https://github.com/jline/jline3/commit/86b7ba7801988aadb1a67555629522a71d603bd3"
},
{
"type": "PACKAGE",
"url": "https://github.com/jline/jline3"
},
{
"type": "WEB",
"url": "https://github.com/jline/jline3/releases/tag/4.0.16"
},
{
"type": "WEB",
"url": "https://github.com/jline/jline3/releases/tag/4.2.1"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
],
"summary": "JLine3 Telnet server: Unauthenticated Remote DoS via Unbounded Telnet NAWS Terminal Geometry"
}
GHSA-47QP-HQVX-6R3F
Vulnerability from github – Published: 2026-06-18 13:07 – Updated: 2026-07-20 21:21
VLAI
Summary
JLine3 Telnet server: Unauthenticated Remote Memory Exhaustion via Unbounded Telnet NEW-ENVIRON Variables
Details
Summary
The JLine3 Telnet server (remote-telnet module) does not limit the number of
environment variables a client may inject via the Telnet NEW-ENVIRON option. An
unauthenticated attacker can flood the server with a large number of unique
variable pairs before sending the terminating IAC SE byte, exhausting JVM heap
memory and causing an OutOfMemoryError (denial of service). Approximately 3–4 MB of
network traffic is sufficient to consume a 512 MB JVM heap.
Details
TelnetIO.readNEVariables() (TelnetIO.java:1127-1180) processes incoming NEW-ENVIRON
variable pairs in a loop and stores each pair in a HashMap held by ConnectionData:
// TelnetIO.java:1139-1178
boolean cont = true;
if (i == NE_VAR || i == NE_USERVAR) {
do {
switch (readNEVariableName(sbuf)) {
case NE_VAR_OK:
TelnetIO.this.connectionData.getEnvironment().put(str, sbuf.toString());
// ← no per-connection count limit
break;
case NE_VAR_UNDEFINED:
break; // cont remains true, loop continues
}
} while (cont); // cont is never set to false; only exits via return
}
The variable accumulator map is a plain HashMap initialized with capacity 20 and
no maximum size:
// ConnectionData.java:98
environment = new HashMap<String, String>(20);
Per-variable limits exist (name: max 50 chars, value: max 1000 chars), but there is no
cap on the count of variables. Each map entry occupies approximately 2 KB of heap
(String headers + Map.Entry + backing char arrays). On a JVM with a 512 MB heap,
approximately 250,000 unique entries trigger an OutOfMemoryError.
Network cost: using sequential 1-byte names (e.g., \x01, \x02, ...) and 1-byte
values, each variable pair requires roughly 13 protocol bytes. Sending 250,000 pairs
requires only ~3.25 MB of network traffic — feasible in seconds over any reasonable
network connection.
No authentication is required. NEW-ENVIRON negotiation occurs before login.
Affected source files:
- remote-telnet/src/main/java/org/jline/builtins/telnet/TelnetIO.java lines 1127-1180
- remote-telnet/src/main/java/org/jline/builtins/telnet/ConnectionData.java line 98
PoC
Connect to the JLine3 Telnet server and, after completing WILL/DO option negotiation, send a NEW-ENVIRON SEND subneg followed by a single large IS subneg containing thousands of unique variable pairs before the final IAC SE.
Protocol structure (no authentication required): 1. Standard Telnet option negotiation (IAC DO NEW-ENVIRON, IAC WILL NEW-ENVIRON) 2. Server sends IAC SB NEW-ENVIRON SEND IAC SE 3. Client responds with: IAC SB NEW-ENVIRON IS [NE_VAR 0x01 NE_VALUE 0x01] ← variable pair 1 [NE_VAR 0x02 NE_VALUE 0x01] ← variable pair 2 ... repeated N times ... IAC SE ← only sent after N pairs
Each iteration adds one entry to the per-connection environment map. The connection thread blocks reading from the socket while accumulating pairs, so the attacker controls the timing of the OOM.
Reproduction environment:
- JLine3 built from current master on x86_64 Linux, OpenJDK 25.0.2
- remote-telnet module started with its default configuration
- Confirmed by source-code analysis; loop exit condition and missing count guard
verified by inspection of readNEVariables() and ConnectionData constructor
Impact
Type: Denial of Service (heap memory exhaustion / OutOfMemoryError)
Who is affected: Any application embedding the JLine3 remote-telnet module and
exposing its Telnet server. No credentials are required. A single connection can exhaust
the entire JVM heap, crashing the host process or triggering JVM out-of-memory
handling that impacts all users sharing that JVM instance.
Credits
This issue was identified by Michał Majchrowicz and Marcin Wyczechowski, members of the AFINE Team.
Severity
7.5 (High)
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],
"aliases": [
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"CWE-400"
],
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"nvd_published_at": "2026-07-17T22:17:57Z",
"severity": "HIGH"
},
"details": "### Summary\n\nThe JLine3 Telnet server (`remote-telnet` module) does not limit the number of\nenvironment variables a client may inject via the Telnet NEW-ENVIRON option. An\nunauthenticated attacker can flood the server with a large number of unique\nvariable pairs before sending the terminating IAC SE byte, exhausting JVM heap\nmemory and causing an OutOfMemoryError (denial of service). Approximately 3\u20134 MB of\nnetwork traffic is sufficient to consume a 512 MB JVM heap.\n\n### Details\n\n`TelnetIO.readNEVariables()` (TelnetIO.java:1127-1180) processes incoming NEW-ENVIRON\nvariable pairs in a loop and stores each pair in a `HashMap` held by `ConnectionData`:\n\n```java\n// TelnetIO.java:1139-1178\nboolean cont = true;\nif (i == NE_VAR || i == NE_USERVAR) {\n do {\n switch (readNEVariableName(sbuf)) {\n case NE_VAR_OK:\n TelnetIO.this.connectionData.getEnvironment().put(str, sbuf.toString());\n // \u2190 no per-connection count limit\n break;\n case NE_VAR_UNDEFINED:\n break; // cont remains true, loop continues\n }\n } while (cont); // cont is never set to false; only exits via return\n}\n```\n\nThe variable accumulator map is a plain `HashMap` initialized with capacity 20 and\n**no maximum size**:\n\n```java\n// ConnectionData.java:98\nenvironment = new HashMap\u003cString, String\u003e(20);\n```\n\nPer-variable limits exist (name: max 50 chars, value: max 1000 chars), but there is no\ncap on the *count* of variables. Each map entry occupies approximately 2 KB of heap\n(String headers + `Map.Entry` + backing char arrays). On a JVM with a 512 MB heap,\napproximately 250,000 unique entries trigger an `OutOfMemoryError`.\n\nNetwork cost: using sequential 1-byte names (e.g., `\\x01`, `\\x02`, ...) and 1-byte\nvalues, each variable pair requires roughly 13 protocol bytes. Sending 250,000 pairs\nrequires only ~3.25 MB of network traffic \u2014 feasible in seconds over any reasonable\nnetwork connection.\n\nNo authentication is required. NEW-ENVIRON negotiation occurs before login.\n\nAffected source files:\n- `remote-telnet/src/main/java/org/jline/builtins/telnet/TelnetIO.java` lines 1127-1180\n- `remote-telnet/src/main/java/org/jline/builtins/telnet/ConnectionData.java` line 98\n\n### PoC\n\nConnect to the JLine3 Telnet server and, after completing WILL/DO option negotiation,\nsend a NEW-ENVIRON SEND subneg followed by a single large IS subneg containing\nthousands of unique variable pairs before the final IAC SE.\n\nProtocol structure (no authentication required):\n1. Standard Telnet option negotiation (IAC DO NEW-ENVIRON, IAC WILL NEW-ENVIRON)\n2. Server sends IAC SB NEW-ENVIRON SEND IAC SE\n3. Client responds with: IAC SB NEW-ENVIRON IS\n [NE_VAR 0x01 NE_VALUE 0x01] \u2190 variable pair 1\n [NE_VAR 0x02 NE_VALUE 0x01] \u2190 variable pair 2\n ... repeated N times ...\n IAC SE \u2190 only sent after N pairs\n\nEach iteration adds one entry to the per-connection environment map. The connection\nthread blocks reading from the socket while accumulating pairs, so the attacker\ncontrols the timing of the OOM.\n\nReproduction environment:\n- JLine3 built from current master on x86_64 Linux, OpenJDK 25.0.2\n- `remote-telnet` module started with its default configuration\n- Confirmed by source-code analysis; loop exit condition and missing count guard\n verified by inspection of `readNEVariables()` and `ConnectionData` constructor\n\n### Impact\n\n**Type**: Denial of Service (heap memory exhaustion / OutOfMemoryError)\n**Who is affected**: Any application embedding the JLine3 `remote-telnet` module and\nexposing its Telnet server. No credentials are required. A single connection can exhaust\nthe entire JVM heap, crashing the host process or triggering JVM out-of-memory\nhandling that impacts all users sharing that JVM instance.\n\n### Credits \n\nThis issue was identified by Micha\u0142 Majchrowicz and Marcin Wyczechowski, members of the AFINE Team.",
"id": "GHSA-47qp-hqvx-6r3f",
"modified": "2026-07-20T21:21:41Z",
"published": "2026-06-18T13:07:25Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/jline/jline3/security/advisories/GHSA-47qp-hqvx-6r3f"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-56740"
},
{
"type": "WEB",
"url": "https://github.com/jline/jline3/pull/2000"
},
{
"type": "WEB",
"url": "https://github.com/jline/jline3/pull/2001"
},
{
"type": "WEB",
"url": "https://github.com/jline/jline3/commit/0389f0ee6d0375901b602671ad5dafd4d1d4ee09"
},
{
"type": "WEB",
"url": "https://github.com/jline/jline3/commit/4ee3a73849ffb9a85ec748e4e8cd8f6d81f84f40"
},
{
"type": "WEB",
"url": "https://github.com/jline/jline3/commit/934f09e6128cee33c2b13d42b6e859c1ee2d194b"
},
{
"type": "PACKAGE",
"url": "https://github.com/jline/jline3"
},
{
"type": "WEB",
"url": "https://github.com/jline/jline3/releases/tag/4.0.16"
},
{
"type": "WEB",
"url": "https://github.com/jline/jline3/releases/tag/4.2.1"
},
{
"type": "WEB",
"url": "https://github.com/jline/jline3/releases/tag/jline-3.30.14"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
],
"summary": "JLine3 Telnet server: Unauthenticated Remote Memory Exhaustion via Unbounded Telnet NEW-ENVIRON Variables"
}
GHSA-5HH8-Q8HV-FR38
Vulnerability from github – Published: 2026-06-23 21:24 – Updated: 2026-07-20 21:21
VLAI
Summary
jackson-databind has @JsonView bypass for setterless creator properties
Details
Summary
In BeanDeserializer._deserializeUsingPropertyBased, the active-view (@JsonView) filter was applied only to creator properties; the regular property-buffering branch performed no prop.visibleInView(activeView) check. A change making SetterlessProperty.isMerging() return true routed setterless Collection/Map properties through this unguarded path, so a setterless collection annotated with a restricted @JsonView is populated from attacker JSON even when the active view excludes it.
Impact
View-restricted (e.g. admin-only) setterless collection/map properties can be written from untrusted JSON despite @JsonView gating — an access-control / mass-assignment bypass. No RCE or DoS.
Affected / Patched (verified via git tag --contains)
- 2.21 line:
>= 2.21.0, < 2.21.4-> fixed in 2.21.4 (backport94c5d21, #5970) - 3.x line:
>= 3.0.0, < 3.1.4-> fixed in 3.1.4 (#5969,5bf23ed)
Severity / CWE
Maintainer: minor. Reporter: HIGH. CWE-863 (Incorrect Authorization); related CWE-1220.
Credits
Omkhar Arasaratnam (@omkhar) - finder.
Severity
5.3 (Medium)
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "com.fasterxml.jackson.core:jackson-databind"
},
"ranges": [
{
"events": [
{
"introduced": "2.21.0"
},
{
"fixed": "2.21.4"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.fasterxml.jackson.core:jackson-databind"
},
"ranges": [
{
"events": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.1.4"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "tools.jackson.core:jackson-databind"
},
"ranges": [
{
"events": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.1.4"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-54517"
],
"database_specific": {
"cwe_ids": [
"CWE-863"
],
"github_reviewed": true,
"github_reviewed_at": "2026-06-23T21:24:50Z",
"nvd_published_at": "2026-06-23T21:17:02Z",
"severity": "MODERATE"
},
"details": "## Summary\nIn `BeanDeserializer._deserializeUsingPropertyBased`, the active-view (`@JsonView`) filter was applied only to creator properties; the regular property-buffering branch performed no `prop.visibleInView(activeView)` check. A change making `SetterlessProperty.isMerging()` return `true` routed setterless Collection/Map properties through this unguarded path, so a setterless collection annotated with a restricted `@JsonView` is populated from attacker JSON even when the active view excludes it.\n\n## Impact\nView-restricted (e.g. admin-only) setterless collection/map properties can be written from untrusted JSON despite `@JsonView` gating \u2014 an access-control / mass-assignment bypass. No RCE or DoS.\n\n## Affected / Patched (verified via `git tag --contains`)\n- 2.21 line: `\u003e= 2.21.0, \u003c 2.21.4` -\u003e fixed in **2.21.4** (backport `94c5d21`, #5970)\n- 3.x line: `\u003e= 3.0.0, \u003c 3.1.4` -\u003e fixed in **3.1.4** (#5969, `5bf23ed`)\n\n## Severity / CWE\nMaintainer: minor. Reporter: HIGH. CWE-863 (Incorrect Authorization); related CWE-1220.\n\n## Credits\nOmkhar Arasaratnam (@omkhar) - finder.",
"id": "GHSA-5hh8-q8hv-fr38",
"modified": "2026-07-20T21:21:27Z",
"published": "2026-06-23T21:24:50Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-5hh8-q8hv-fr38"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-54517"
},
{
"type": "WEB",
"url": "https://github.com/FasterXML/jackson-databind/pull/5969"
},
{
"type": "WEB",
"url": "https://github.com/FasterXML/jackson-databind/pull/5970"
},
{
"type": "WEB",
"url": "https://github.com/FasterXML/jackson-databind/commit/5bf23edb4221f7dd2ec8e71ff6d26c61640f261d"
},
{
"type": "WEB",
"url": "https://github.com/FasterXML/jackson-databind/commit/94c5d215b3af1505098c686405d9641f041a9962"
},
{
"type": "PACKAGE",
"url": "https://github.com/FasterXML/jackson-databind"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
"type": "CVSS_V3"
}
],
"summary": "jackson-databind has @JsonView bypass for setterless creator properties"
}
GHSA-9FXM-VC8V-HJ55
Vulnerability from github – Published: 2026-06-23 21:24 – Updated: 2026-07-20 21:21
VLAI
Summary
jackson-databind's renamed @JsonIgnore'd setters can deserialize via private fields
Details
Summary
POJOPropertiesCollector._renameProperties() allows a property with @JsonProperty("renamed") on the getter and @JsonIgnore on the setter to be renamed rather than dropped. With MapperFeature.INFER_PROPERTY_MUTATORS enabled (default), the private backing field is retained; during deserialization BeanDeserializerFactory.addBeanProps() sees hasField()==true, builds a FieldProperty, and makes the backing field writable. An attacker supplying the renamed JSON key writes the backing field directly, bypassing the @JsonIgnore on the setter.
Impact
POJOs combining a renamed getter with an ignored setter (a read-only-over-the-wire pattern) have that field silently set from attacker input (property tampering / mass assignment). Not a general gadget; no RCE.
Affected / Patched (verified via git tag --contains)
- 2.21 line:
>= 2.21.0, < 2.21.4-> fixed in 2.21.4 (backportc3d56dd, #5968) - 3.x line:
>= 3.0.0, < 3.1.4-> fixed in 3.1.4 (#5967,e88cb17)
Severity / CWE
Maintainer: minor. Reporter: HIGH. CWE-915.
Credits
Omkhar Arasaratnam (@omkhar) - finder.
Severity
5.3 (Medium)
{
"affected": [
{
"package": {
"ecosystem": "Maven",
"name": "com.fasterxml.jackson.core:jackson-databind"
},
"ranges": [
{
"events": [
{
"introduced": "2.21.0"
},
{
"fixed": "2.21.4"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "com.fasterxml.jackson.core:jackson-databind"
},
"ranges": [
{
"events": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.1.4"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Maven",
"name": "tools.jackson.core:jackson-databind"
},
"ranges": [
{
"events": [
{
"introduced": "3.0.0"
},
{
"fixed": "3.1.4"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-54516"
],
"database_specific": {
"cwe_ids": [
"CWE-915"
],
"github_reviewed": true,
"github_reviewed_at": "2026-06-23T21:24:26Z",
"nvd_published_at": "2026-06-23T21:17:02Z",
"severity": "MODERATE"
},
"details": "## Summary\n`POJOPropertiesCollector._renameProperties()` allows a property with `@JsonProperty(\"renamed\")` on the getter and `@JsonIgnore` on the setter to be renamed rather than dropped. With `MapperFeature.INFER_PROPERTY_MUTATORS` enabled (default), the private backing field is retained; during deserialization `BeanDeserializerFactory.addBeanProps()` sees `hasField()==true`, builds a `FieldProperty`, and makes the backing field writable. An attacker supplying the renamed JSON key writes the backing field directly, bypassing the `@JsonIgnore` on the setter.\n\n## Impact\nPOJOs combining a renamed getter with an ignored setter (a read-only-over-the-wire pattern) have that field silently set from attacker input (property tampering / mass assignment). Not a general gadget; no RCE.\n\n## Affected / Patched (verified via `git tag --contains`)\n- 2.21 line: `\u003e= 2.21.0, \u003c 2.21.4` -\u003e fixed in **2.21.4** (backport `c3d56dd`, #5968)\n- 3.x line: `\u003e= 3.0.0, \u003c 3.1.4` -\u003e fixed in **3.1.4** (#5967, `e88cb17`)\n\n## Severity / CWE\nMaintainer: minor. Reporter: HIGH. CWE-915.\n\n## Credits\nOmkhar Arasaratnam (@omkhar) - finder.",
"id": "GHSA-9fxm-vc8v-hj55",
"modified": "2026-07-20T21:21:24Z",
"published": "2026-06-23T21:24:26Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-9fxm-vc8v-hj55"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-54516"
},
{
"type": "WEB",
"url": "https://github.com/FasterXML/jackson-databind/pull/5967"
},
{
"type": "WEB",
"url": "https://github.com/FasterXML/jackson-databind/pull/5968"
},
{
"type": "WEB",
"url": "https://github.com/FasterXML/jackson-databind/commit/c3d56dd25d52319828147c5b9aeabf2d485c250a"
},
{
"type": "WEB",
"url": "https://github.com/FasterXML/jackson-databind/commit/e88cb17006b6af4883b973058f0bb6486e5074af"
},
{
"type": "PACKAGE",
"url": "https://github.com/FasterXML/jackson-databind"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
"type": "CVSS_V3"
}
],
"summary": "jackson-databind\u0027s renamed @JsonIgnore\u0027d setters can deserialize via private fields"
}
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Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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