Common Weakness Enumeration
CWE-789
AllowedMemory Allocation with Excessive Size Value
Abstraction: Variant · Status: Draft
The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated.
414 vulnerabilities reference this CWE, most recent first.
CVE-2026-12185 (GCVE-0-2026-12185)
Vulnerability from cvelistv5 – Published: 2026-08-03 00:38 – Updated: 2026-08-04 01:54
VLAI
EPSS
VEX
Title
BKS/UBER keystore allocates from untrusted lengths before integrity check
Summary
In Bouncy Castle for Java before 1.85, BKS/UBER keystore allocates from untrusted lengths before integrity check. This issue also affects Bouncy Castle for Java LTS before 2.73.12.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-03 13:29 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/bcgit/bc-java/wiki/CVE%E2%80%9… | vendor-advisory |
| https://github.com/bcgit/bc-java/commit/7bbd7fe5f… | patch |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Legion of the Bouncy Castle Inc. | BC-JAVA |
Affected:
0 , < 1.85
(maven)
|
|
| Legion of the Bouncy Castle Inc. | BC-LTS-JAVA |
Affected:
2.73.0 , < 2.73.12
(maven)
|
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CVE-2026-11946 (GCVE-0-2026-11946)
Vulnerability from cvelistv5 – Published: 2026-07-02 10:54 – Updated: 2026-07-02 12:15
VLAI
EPSS
VEX
Title
GetEndpoints Memory Exhaustion in open62541
Summary
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server memory via the GetEndpoints Discovery Service in open62541. The
endpointUrl field of GetEndpointsRequest is not validated for length. An
attacker can declare an arbitrarily large string (up to ~4.09 GB via the UInt32
length field) delivered across intermediate chunks without ever sending the
final chunk. The server buffers all chunks in RAM indefinitely until the
SecureChannel times out. The attack is
pre-session and bypasses all encryption configurations.
The issue affects open62541: from 1.4.0 through 1.4.16, from 1.5.0 through 1.5.4, master.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-02 12:15 UTC
CWE
Assigner
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| open62541 project / o6 Automation GmbH | open62541 |
Affected:
1.4.0 , ≤ 1.4.16
(semver)
Affected: 1.5.0 , ≤ 1.5.4 (semver) Affected: master (custom) |
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CVE-2026-10142 (GCVE-0-2026-10142)
Vulnerability from cvelistv5 – Published: 2026-06-10 20:13 – Updated: 2026-07-14 15:53
VLAI
EPSS
VEX
Title
kafka-python prior to 2.3.2 Denial of Service via Protocol Parser Frame Length
Summary
kafka-python prior to 2.3.2 contains a denial-of-service vulnerability in the protocol parser that allows a malicious broker or machine-in-the-middle attacker to exhaust memory or hang connections by sending a crafted 4-byte frame length value without bounds validation. Attackers can send a specially crafted frame length through the receive_bytes() function to trigger either a multi-gigabyte memory allocation or an uncaught ValueError that leaves the connection in a broken state, causing requests to hang and consumers to stop heartbeating until restart.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-11 14:12 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://www.vulncheck.com/advisories/kafka-python… | technical-descriptionthird-party-advisory |
| https://github.com/dpkp/kafka-python/pull/3019 | issue-tracking |
| https://github.com/dpkp/kafka-python/pull/3026 | issue-tracking |
| https://github.com/dpkp/kafka-python/commit/6e483… | patch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Dana Powers | kafka-python |
Affected:
0 , < 2.3.2
(git)
cpe:2.3:a:dpkp:kafka-python:*:*:*:*:*:python:*:* |
Date Public
2026-06-10 00:00
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CVE-2026-9538 (GCVE-0-2026-9538)
Vulnerability from cvelistv5 – Published: 2026-05-26 00:18 – Updated: 2026-05-28 13:16
VLAI
EPSS
VEX
Title
Archive::Tar versions before 3.10 for Perl allow memory exhaustion via attacker controlled entry size field in tar header
Summary
Archive::Tar versions before 3.10 for Perl allow memory exhaustion via attacker controlled entry size field in tar header.
_read_tar() reads each entry's payload with $handle->read($$data, $block), where $block is derived from the entry's 12-byte size field in the tar header with no upper bound on that value.
A crafted header declaring a multi-gigabyte size causes Perl to allocate a scalar of that size.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-28 13:16 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| BINGOS | Archive::Tar |
Affected:
0 , < 3.10
(custom)
|
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CVE-2026-8485 (GCVE-0-2026-8485)
Vulnerability from cvelistv5 – Published: 2026-05-20 14:06 – Updated: 2026-05-20 14:24
VLAI
EPSS
VEX
Title
Uncontrolled Memory Allocation vulnerability in Progress Software MOVEit Automation
Summary
Uncontrolled Memory Allocation vulnerability in Progress Software MOVEit Automation allows Excessive Allocation.
This issue affects MOVEit Automation: before 2025.0.11, from 2025.1.0 before 2025.1.7.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-20 14:24 UTC
CWE
- CWE-789 - Uncontrolled Memory Allocation
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://docs.progress.com/bundle/moveit-automatio… | vendor-advisory |
Impacted products
1 product
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| Progress Software | MOVEit Automation |
Affected:
0 , < 2025.0.11
(semver)
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CVE-2026-6340 (GCVE-0-2026-6340)
Vulnerability from cvelistv5 – Published: 2026-05-18 07:08 – Updated: 2026-05-18 12:43
VLAI
EPSS
VEX
Title
Memory Exhaustion via Malicious 7zip File Upload
Summary
Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13, 11.4.x <= 11.4.3 fail to validate 7zip archive structure before processing which allows an authenticated attacker to cause server memory exhaustion and denial of service via uploading a specially crafted 7zip file with excessive folder declarations.. Mattermost Advisory ID: MMSA-2026-00573
Severity
4.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-18 12:43 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
1 reference
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|---|---|
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Impacted products
1 product
| Vendor | Product | Version | |
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| Mattermost | Mattermost |
Affected:
11.5.0 , ≤ 11.5.1
(semver)
Affected: 10.11.0 , ≤ 10.11.13 (semver) Affected: 11.4.0 , ≤ 11.4.3 (semver) Unaffected: 11.6.0 Unaffected: 11.5.2 Unaffected: 10.11.14 Unaffected: 11.4.4 |
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CVE-2026-5740 (GCVE-0-2026-5740)
Vulnerability from cvelistv5 – Published: 2026-05-22 10:22 – Updated: 2026-05-22 12:14
VLAI
EPSS
VEX
Title
Unauthenticated WebSocket binary frame causes denial of service in Mattermost Server
Summary
Mattermost versions 11.6.x <= 11.6.0, 11.5.x <= 11.5.3, 11.4.x <= 11.4.4, 10.11.x <= 10.11.14 fail to properly validate msgpack-encoded WebSocket frames before memory allocation which allows an unauthenticated remote attacker to crash the server process and cause a full service outage for all users via a crafted binary WebSocket message sent to the public WebSocket endpoint.. Mattermost Advisory ID: MMSA-2026-00647
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-22 12:14 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://mattermost.com/security-updates | vendor-advisory |
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1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Mattermost | Mattermost |
Affected:
11.6.0 , ≤ 11.6.0
(semver)
Affected: 11.5.0 , ≤ 11.5.3 (semver) Affected: 11.4.0 , ≤ 11.4.4 (semver) Affected: 10.11.0 , ≤ 10.11.14 (semver) Unaffected: 11.7.0 Unaffected: 11.6.1 Unaffected: 11.5.4 Unaffected: 11.4.5 Unaffected: 10.11.15 |
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CVE-2026-2456 (GCVE-0-2026-2456)
Vulnerability from cvelistv5 – Published: 2026-03-16 11:06 – Updated: 2026-03-16 13:49
VLAI
EPSS
VEX
Title
Denial of Service via Unbounded Memory Allocation in Integration Actions
Summary
Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 Mattermost fails to limit the size of responses from integration action endpoints, which allows an authenticated attacker to cause server memory exhaustion and denial of service via a malicious integration server that returns an arbitrarily large response when a user clicks an interactive message button.. Mattermost Advisory ID: MMSA-2026-00571
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-16 13:43 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
1 reference
| URL | Tags |
|---|---|
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Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Mattermost | Mattermost |
Affected:
11.3.0 , ≤ 11.3.0
(semver)
Affected: 11.2.0 , ≤ 11.2.2 (semver) Affected: 10.11.0 , ≤ 10.11.10 (semver) Unaffected: 11.4.0 Unaffected: 11.3.1 Unaffected: 11.2.3 Unaffected: 10.11.11 |
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CVE-2025-71395 (GCVE-0-2025-71395)
Vulnerability from cvelistv5 – Published: 2026-07-18 13:10 – Updated: 2026-07-28 01:48
VLAI
EPSS
VEX
Title
SurrealDB before 2.2.2 Memory Exhaustion via string::replace
Summary
SurrealDB versions before 2.2.2 contain a memory exhaustion vulnerability in the string::replace function that fails to restrict resulting string length when using regex patterns. An authenticated attacker can craft a malicious query to exhaust server memory through unbounded string allocations, causing denial of service.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-22 19:09 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/surrealdb/surrealdb/security/a… | vendor-advisory |
| https://www.vulncheck.com/advisories/surrealdb-be… | third-party-advisory |
Impacted products
Date Public
2025-04-10 00:00
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CVE-2025-66199 (GCVE-0-2025-66199)
Vulnerability from cvelistv5 – Published: 2026-01-27 16:01 – Updated: 2026-01-29 15:03
VLAI
EPSS
VEX
Title
TLS 1.3 CompressedCertificate excessive memory allocation
Summary
Issue summary: A TLS 1.3 connection using certificate compression can be
forced to allocate a large buffer before decompression without checking
against the configured certificate size limit.
Impact summary: An attacker can cause per-connection memory allocations of
up to approximately 22 MiB and extra CPU work, potentially leading to
service degradation or resource exhaustion (Denial of Service).
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length from a CompressedCertificate message is used to grow a heap buffer
prior to decompression. This length is not bounded by the max_cert_list
setting, which otherwise constrains certificate message sizes. An attacker
can exploit this to cause large per-connection allocations followed by
handshake failure. No memory corruption or information disclosure occurs.
This issue only affects builds where TLS 1.3 certificate compression is
compiled in (i.e., not OPENSSL_NO_COMP_ALG) and at least one compression
algorithm (brotli, zlib, or zstd) is available, and where the compression
extension is negotiated. Both clients receiving a server CompressedCertificate
and servers in mutual TLS scenarios receiving a client CompressedCertificate
are affected. Servers that do not request client certificates are not
vulnerable to client-initiated attacks.
Users can mitigate this issue by setting SSL_OP_NO_RX_CERTIFICATE_COMPRESSION
to disable receiving compressed certificates.
The FIPS modules in 3.6, 3.5, 3.4 and 3.3 are not affected by this issue,
as the TLS implementation is outside the OpenSSL FIPS module boundary.
OpenSSL 3.6, 3.5, 3.4 and 3.3 are vulnerable to this issue.
OpenSSL 3.0, 1.1.1 and 1.0.2 are not affected by this issue.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-29 15:03 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
5 references
Impacted products
Date Public
2026-01-27 14:00
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Mitigation
Implementation
Architecture and Design
Perform adequate input validation against any value that influences the amount of memory that is allocated. Define an appropriate strategy for handling requests that exceed the limit, and consider supporting a configuration option so that the administrator can extend the amount of memory to be used if necessary.
Mitigation
Operation
Run your program using system-provided resource limits for memory. This might still cause the program to crash or exit, but the impact to the rest of the system will be minimized.
No CAPEC attack patterns related to this CWE.