Common Weakness Enumeration
CWE-502
AllowedDeserialization of Untrusted Data
Abstraction: Base · Status: Draft
The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
5082 vulnerabilities reference this CWE, most recent first.
CVE-2026-79657 (GCVE-0-2026-79657)
Vulnerability from cvelistv5 – Published: 2026-08-25 11:33 – Updated: 2026-08-25 15:58
VLAI
EPSS
VEX
Title
NLTK before 3.10.3 Remote Code Execution via Unsafe Pickle Deserialization
Summary
NLTK versions before 3.10.3 contain a remote code execution vulnerability in allowlisted pickle loaders that trust entire module namespaces instead of specific safe callables. Attackers can craft malicious pickle payloads invoking dangerous in-namespace functions like ReppTokenizer._execute and numpy.f2py.crackfortran.myeval through pickle REDUCE to execute arbitrary commands during model or tokenizer artifact loading.
Severity
9.8 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 15:58 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/nltk/nltk/security/advisories/… | vendor-advisory |
| https://www.vulncheck.com/advisories/nltk-before-… | third-party-advisory |
Impacted products
Date Public
2026-08-11 00:00
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CVE-2026-78683 (GCVE-0-2026-78683)
Vulnerability from cvelistv5 – Published: 2026-08-25 01:30 – Updated: 2026-08-25 15:19
VLAI
EPSS
VEX
Title
NLTK before 3.10.0 Remote Code Execution via Unsafe Pickle Deserialization
Summary
NLTK before 3.10.0 (affected versions <=3.9.4) contains an unsafe pickle deserialization vulnerability in the TransitionParser.parse() method (nltk/parse/transitionparser.py). The method calls pickle_load() with the default restricted=False, routing deserialization through WarningUnpickler, which does not override find_class() and therefore permits arbitrary class resolution. When an application loads an attacker-crafted model file, embedded pickle gadget chains execute arbitrary Python code with the privileges of the user running the application. NLTK provides a RestrictedUnpickler for safe deserialization, but it is not used by production code paths. Fixed in 3.10.0.
Severity
9.6 (Critical)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 15:19 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/nltk/nltk/security/advisories/… | vendor-advisory |
| https://www.vulncheck.com/advisories/nltk-before-… | third-party-advisory |
Impacted products
Date Public
2026-08-11 00:00
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CVE-2026-78572 (GCVE-0-2026-78572)
Vulnerability from cvelistv5 – Published: 2026-08-25 09:27 – Updated: 2026-08-25 18:07
VLAI
EPSS
VEX
Title
Kalles Addons <= 1.0.6 - Unauthenticated PHP Object Injection
Summary
The Kalles Addons plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 1.0.6 via deserialization of untrusted input. This makes it possible for unauthenticated attackers to inject a PHP Object. No known POP chain is present in the vulnerable software, which means this vulnerability has no impact unless another plugin or theme containing a POP chain is installed on the site. If a POP chain is present via an additional plugin or theme installed on the target system, it may allow the attacker to perform actions like delete arbitrary files, retrieve sensitive data, or execute code depending on the POP chain present.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 18:07 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| unknown | Kalles Addons |
Affected:
0 , ≤ 1.0.6
(semver)
|
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CVE-2026-78265 (GCVE-0-2026-78265)
Vulnerability from cvelistv5 – Published: 2026-08-24 21:31 – Updated: 2026-08-25 14:40
VLAI
EPSS
VEX
Title
WordPress The Events Calendar plugin <= 6.17.2 - PHP Object Injection vulnerability
Summary
Unauthenticated PHP Object Injection in The Events Calendar <= 6.17.2 versions.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 14:40 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/plugin/… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Nexcess | The Events Calendar |
Affected:
n/a , ≤ 6.17.2
(custom)
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CVE-2026-78262 (GCVE-0-2026-78262)
Vulnerability from cvelistv5 – Published: 2026-08-24 21:31 – Updated: 2026-08-24 21:31
VLAI
EPSS
VEX
Title
WordPress WP Project Manager plugin <= 4.0.6 - PHP Object Injection vulnerability
Summary
Unauthenticated PHP Object Injection in WP Project Manager <= 4.0.6 versions.
Severity
9.8 (Critical)
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/plugin/… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| weDevs | WP Project Manager |
Affected:
n/a , ≤ 4.0.6
(custom)
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CVE-2026-78147 (GCVE-0-2026-78147)
Vulnerability from cvelistv5 – Published: 2026-08-23 23:00 – Updated: 2026-08-23 23:00
VLAI
EPSS
VEX
Title
ggml-org llama.cpp ggml-RPC Server ggml-rpc.cpp deserialize_tensor deserialization
Summary
A vulnerability was found in ggml-org llama.cpp bec4772f6. The impacted element is the function deserialize_tensor of the file ggml/src/ggml-rpc/ggml-rpc.cpp of the component ggml-RPC Server. Performing a manipulation of the argument op/op_params results in deserialization. The attack may be initiated remotely. This vulnerability is distinct from CVE-2026-34159 (GHSA-j8rj-fmpv-wcxw, PR #20908), which only added a buffer==nullptr rejection in create_node() and does not validate op or op_params. The reported GitHub issue was closed automatically due to inactivity.
Severity
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/394534 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/394534/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-78147 | third-party-advisory |
| https://vuldb.com/submit/882534 | third-party-advisory |
| https://github.com/ggml-org/llama.cpp/issues/25289 | issue-tracking |
| https://github.com/ggml-org/llama.cpp/ | product |
Impacted products
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CVE-2026-77646 (GCVE-0-2026-77646)
Vulnerability from cvelistv5 – Published: 2026-08-20 22:11 – Updated: 2026-08-21 20:08
VLAI
EPSS
VEX
Title
Server Side Request Forgery (SSRF) vulnerability reported in Windchill
Summary
A Server-Side Request Forgery (SSRF) vulnerability has been reported in PTC Windchill PDMLink and PTC FlexPLM. The vulnerability may be exploited through the deserialization of untrusted data.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-21 19:49 UTC
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.ptc.com/en/support/article/CS474826 | vendor-advisorymitigationpermissions-required |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| PTC | Windchill PDMLink |
Affected:
11.0 M030
Affected: 11.1 M020 Affected: 11.2.1.0 Affected: 12.0.2.0 Affected: 12.1.2.0 Affected: 13.0.2.0 Affected: 13.1.0.0 Affected: 13.1.1.0 Affected: 13.1.2.0 Affected: 13.1.3.0 |
|
| PTC | FlexPLM |
Affected:
11.0 M030
Affected: 11.1 M020 Affected: 11.2.1.0 Affected: 12.0.0.0 Affected: 12.0.2.0 Affected: 12.0.3.0 Affected: 12.1.2.0 Affected: 12.1.3.0 Affected: 13.0.2.0 Affected: 13.0.3.0 |
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CVE-2026-77645 (GCVE-0-2026-77645)
Vulnerability from cvelistv5 – Published: 2026-08-20 22:08 – Updated: 2026-08-22 03:55
VLAI
EPSS
VEX
Title
Critical Remote Code Execution (RCE) vulnerability reported in Windchill
Summary
A critical remote code execution (RCE) vulnerability has been reported in PTC Windchill and PTC FlexPLM. The vulnerability may be exploited through the deserialization of untrusted data.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-21 00:00 UTC
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.ptc.com/en/support/article/CS474826 | vendor-advisorymitigationpermissions-required |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| PTC | Windchill PDMLink |
Affected:
11.0 M030
Affected: 11.1 M020 Affected: 11.2.1.0 Affected: 12.0.2.0 Affected: 12.1.2.0 Affected: 13.0.2.0 Affected: 13.1.0.0 Affected: 13.1.1.0 Affected: 13.1.2.0 Affected: 13.1.3.0 |
|
| PTC | FlexPLM |
Affected:
11.0 M030
Affected: 11.1 M020 Affected: 11.2.1.0 Affected: 12.0.0.0 Affected: 12.0.2.0 Affected: 12.0.3.0 Affected: 12.1.2.0 Affected: 12.1.3.0 Affected: 13.0.2.0 Affected: 13.0.3.0 |
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CVE-2026-77138 (GCVE-0-2026-77138)
Vulnerability from cvelistv5 – Published: 2026-08-25 09:00 – Updated: 2026-08-25 14:05
VLAI
EPSS
VEX
Title
Remote Code Execution in extension "HTML5 Video Player vs. Powermail" (html5videoplayer_powermail)
Summary
The extension fails to safely process untrusted client input of an attacker-controlled cookie directly to PHP's unserialize(). A remote, unauthenticated attacker can supply a crafted serialized payload to trigger PHP Object Injection, leading to Remote Code Execution on the TYPO3 server.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 14:04 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://typo3.org/security/advisory/typo3-ext-sa-… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| TYPO3 | Extension "HTML5 Video Player vs. Powermail" |
Affected:
0 , ≤ 0.2.1
(semver)
|
Date Public
2026-08-25 09:00
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CVE-2026-76850 (GCVE-0-2026-76850)
Vulnerability from cvelistv5 – Published: 2026-08-19 21:41 – Updated: 2026-08-21 11:21
VLAI
EPSS
VEX
Title
LMDeploy Remote Code Execution via Unsafe Pickle Deserialization in the Disaggregated Serving Peer Connector
Summary
LMDeploy deserializes disaggregated-serving peer messages with pickle. The handle_zmq_recv coroutine in lmdeploy/pytorch/disagg/conn/engine_conn.py reads peer-to-peer cache-free requests with recv_pyobj(), which deserializes the received bytes with pickle.loads(), and the isinstance check against DistServeCacheFreeRequest runs only after deserialization has already completed. The peer that supplies those bytes is caller-controlled: p2p_connect passes remote_engine_endpoint_info.zmq_address from the request body to connect() on the ZMQ PULL socket, and the POST /distserve/p2p_initialize and /distserve/p2p_connect endpoints in lmdeploy/serve/openai/api_server.py apply no authentication unless the server is started with api_keys, which defaults to None. A remote attacker can direct an engine to pull from a ZMQ endpoint under their control and execute arbitrary code in the engine process. Deployments that do not enable disaggregated serving are not affected, because the receive loop is only started once the migration backend accepts the connection.
Severity
9.8 (Critical)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 14:08 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://github.com/InternLM/lmdeploy/issues/4804 | issue-tracking |
| https://github.com/InternLM/lmdeploy/commit/f05b4… | patch |
| https://github.com/InternLM/lmdeploy/blob/v0.15.0… | technical-description |
| https://github.com/InternLM/lmdeploy/blob/v0.15.0… | technical-description |
| https://github.com/InternLM/lmdeploy/releases/tag… | release-notes |
| https://github.com/InternLM/lmdeploy | product |
| https://www.vulncheck.com/advisories/lmdeploy-rem… | third-party-advisory |
Impacted products
Date Public
2026-07-29 00:00
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Mitigation
Architecture and Design
Implementation
If available, use the signing/sealing features of the programming language to assure that deserialized data has not been tainted. For example, a hash-based message authentication code (HMAC) could be used to ensure that data has not been modified.
Mitigation
Implementation
When deserializing data, populate a new object rather than just deserializing. The result is that the data flows through safe input validation and that the functions are safe.
Mitigation
Implementation
Explicitly define a final object() to prevent deserialization.
Mitigation
Architecture and Design
Implementation
- Make fields transient to protect them from deserialization.
- An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.
Mitigation
Implementation
Avoid having unnecessary types or gadgets (a sequence of instances and method invocations that can self-execute during the deserialization process, often found in libraries) available that can be leveraged for malicious ends. This limits the potential for unintended or unauthorized types and gadgets to be leveraged by the attacker. Add only acceptable classes to an allowlist. Note: new gadgets are constantly being discovered, so this alone is not a sufficient mitigation.
Mitigation
Architecture and Design
Implementation
Employ cryptography of the data or code for protection. However, it's important to note that it would still be client-side security. This is risky because if the client is compromised then the security implemented on the client (the cryptography) can be bypassed.
Mitigation MIT-29
Operation
Strategy: Firewall
Use an application firewall that can detect attacks against this weakness. It can be beneficial in cases in which the code cannot be fixed (because it is controlled by a third party), as an emergency prevention measure while more comprehensive software assurance measures are applied, or to provide defense in depth [REF-1481].
CAPEC-586: Object Injection
An adversary attempts to exploit an application by injecting additional, malicious content during its processing of serialized objects. Developers leverage serialization in order to convert data or state into a static, binary format for saving to disk or transferring over a network. These objects are then deserialized when needed to recover the data/state. By injecting a malformed object into a vulnerable application, an adversary can potentially compromise the application by manipulating the deserialization process. This can result in a number of unwanted outcomes, including remote code execution.