Common Weakness Enumeration

CWE-502

Allowed

Deserialization of Untrusted Data

Abstraction: Base · Status: Draft

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

2664 vulnerabilities reference this CWE, most recent first.

CVE-2026-104723 (GCVE-0-2026-104723)

Vulnerability from cvelistv5 – Published: 2026-10-10 05:31 – Updated: 2026-10-11 16:55
VLAI
Title
LifterLMS <= 10.2.1 - Authenticated (Custom+) PHP Object Injection via 'custom' Lesson Data
Summary
The LifterLMS – WP LMS for eLearning, Online Courses, & Quizzes plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 10.2.1 via deserialization of untrusted input . This makes it possible for authenticated attackers, with custom-level access and above, 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. This vulnerability is only exploitable during lesson creation when a temporary lesson ID triggers the custom metadata path, and requires the attacker to hold a role with the edit_course capability, such as Instructor, Instructor's Assistant, LMS Manager, or Administrator.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-11 16:42 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
Wordfence CNA
Impacted products
Show details on NVD website

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CVE-2026-104398 (GCVE-0-2026-104398)

Vulnerability from cvelistv5 – Published: 2026-10-10 17:00 – Updated: 2026-10-11 12:13 X_Open Source
VLAI
Title
WordPress AFFI – Affiliate Marketing for WooCommerce plugin <= 1.0.10 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in VillaTheme AFFI – Affiliate Marketing for WooCommerce affi-affiliate-marketing-for-woo allows Object Injection.This issue affects AFFI – Affiliate Marketing for WooCommerce: from n/a through 1.0.10.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-11 12:05 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Date Public
2026-10-08 16:53
Show details on NVD website

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CVE-2026-104392 (GCVE-0-2026-104392)

Vulnerability from cvelistv5 – Published: 2026-10-09 12:08 – Updated: 2026-10-09 20:01 X_Open Source
VLAI
Title
WordPress Quiz And Survey Master plugin <= 11.2.7 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in ExpressTech Quiz And Survey Master quiz-master-next allows Object Injection.This issue affects Quiz And Survey Master: from n/a through 11.2.7.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-09 20:01 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
ExpressTech Quiz And Survey Master Affected: 0 , ≤ 11.2.7 (custom)
Create a notification for this product.
Date Public
2026-10-07 11:20
Show details on NVD website

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CVE-2026-104324 (GCVE-0-2026-104324)

Vulnerability from cvelistv5 – Published: 2026-10-29 15:17 – Updated: 2026-10-30 17:18
VLAI
Title
Langflow OSS is affected by multiple vulnerabilities
Summary
IBM Langflow OSS 1.0.0 through 1.12.3 could allow a remote authenticated attacker to execute arbitrary code due to deserialization of untrusted data.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 03:56 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
ibm CNA
References
URL Tags
https://www.ibm.com/support/pages/node/7293015 vendor-advisorypatch
Impacted products
Vendor Product Version
IBM Langflow OSS Affected: 1.0.0 , ≤ 1.12.3 (semver)
    cpe:2.3:a:ibm:langflow_oss:1.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:langflow_oss:1.12.3:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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CVE-2026-104317 (GCVE-0-2026-104317)

Vulnerability from cvelistv5 – Published: 2026-10-29 15:17 – Updated: 2026-10-30 17:18
VLAI
Title
Langflow OSS is affected by multiple vulnerabilities
Summary
IBM Langflow OSS 1.0.0 through 1.12.3 could allow a remote attacker who could reach the message broker to execute arbitrary code on the system due to the deserialization of untrusted data.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 03:56 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
ibm CNA
References
URL Tags
https://www.ibm.com/support/pages/node/7293015 vendor-advisorypatch
Impacted products
Vendor Product Version
IBM Langflow OSS Affected: 1.0.0 , ≤ 1.12.3 (semver)
    cpe:2.3:a:ibm:langflow_oss:1.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:langflow_oss:1.12.3:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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CVE-2026-104010 (GCVE-0-2026-104010)

Vulnerability from cvelistv5 – Published: 2026-11-06 11:17 – Updated: 2026-11-06 15:15
VLAI
Title
WPSyncSheets For Contact Form 7 <= 1.8.0 - Unauthenticated PHP Object Injection to Remote Code Execution via Untrusted CF7 Submission Field via maybe_unserialize()
Summary
The WPSyncSheets For Contact Form 7 – CF7 Google Sheets Connector & Save to Database plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 1.8.0 via the 'any non-system CF7 field (e.g., your-message)' parameter parameter. This is due to insufficient sanitization of CF7 submission field values before database storage and the absence of an allowed_classes restriction on maybe_unserialize() during admin retrieval. This makes it possible for unauthenticated attackers to execute code on the server. Successful exploitation of the remote code execution gadget chain requires that a Google Sheets access token be configured in the plugin (its primary advertised feature), as this triggers autoloading of the bundled Monolog 2.10.0 library whose classes form the exploitable gadget chain; however, the underlying PHP Object Injection occurs regardless.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-06 15:11 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
Wordfence CNA
Credits
Show details on NVD website

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CVE-2026-103877 (GCVE-0-2026-103877)

Vulnerability from cvelistv5 – Published: 2026-10-02 10:08 – Updated: 2026-10-07 22:07
VLAI
Title
Apache Directory LDAP API: Unsafe loading of Java code from LDAP schema elements
Summary
Deserialization of Untrusted Data vulnerability in Apache Directory LDAP API. A rogue/compromised LDAP server (or pre-TLS MITM) can answer a client's loadSchema() subschema search with a schema object that contains a serialized Java class, allowing some potential RCE.  This issue affects Apache Directory LDAP API: from 2.1.0 before 2.1.9. Users are recommended to upgrade to version 2.1.9, which fixes the issue.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 20:54 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
apache CNA
Impacted products
Show details on NVD website

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CVE-2026-103831 (GCVE-0-2026-103831)

Vulnerability from cvelistv5 – Published: 2026-10-06 10:28 – Updated: 2026-10-06 10:48
VLAI
Title
Insecure deserialization in the TrueLayer Magento 2 plugin
Summary
CVE-2026-103831: Insecure deserialization vulnerability in the Psr16CacheAdapter component of the TrueLayer Magento 2 Plugin, due to the use of PHP's native unserialize() function without restrictions on the classes allowed when retrieving data stored in the cache. An attacker who already has the ability to write manipulated data to the cache backend used by Magento—such as Redis or Memcached—could inject specially crafted PHP objects and trigger their deserialization, potentially leading to arbitrary code execution via gadget strings available in the application environment. Exploitation therefore requires a prerequisite condition that allows writing to the cache infrastructure, either through access to the local file system or to a cache infrastructure accessible from the Magento environment.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-06 10:48 UTC
CWE
  • CWE-502 - Deserialization of untrusted data
Assigner
INCIBE CNA
Impacted products
Vendor Product Version
TrueLayer TrueLayer Magento 2 Plugin Affected: versions 2.4.0 through 2.4.2.
    cpe:2.3:a:truelayer:truelayer_magento_2_plugin:versions_2.4.0_through_2.4.2.:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-10-06 10:25
Show details on NVD website

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CVE-2026-103441 (GCVE-0-2026-103441)

Vulnerability from cvelistv5 – Published: 2026-09-30 15:59 – Updated: 2026-11-09 16:29
VLAI
Title
Unauthenticated arbitrary file deletion through Wikibase serialized entity parsing
Summary
Deserialization of untrusted data vulnerability in The Wikimedia Foundation MediaWiki Wikibase extension allows Leverage Executable Code in Non-Executable Files. This issue affects MediaWiki Wikibase extension: 1.46, 1.45, and 1.43.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-09 16:29 UTC
CWE
  • CWE-502 - Deserialization of untrusted data
Assigner
Impacted products
Vendor Product Version
The Wikimedia Foundation MediaWiki Wikibase extension Affected: 1.46
Affected: 1.45
Affected: 1.43
Create a notification for this product.
Date Public
2026-09-30 15:46
Show details on NVD website

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CVE-2026-103395 (GCVE-0-2026-103395)

Vulnerability from cvelistv5 – Published: 2026-09-30 14:48 – Updated: 2026-09-30 19:38
VLAI
Title
LightLLM through 1.2.0 Unauthenticated Remote Code Execution via Visual-Only RPyC Service
Summary
LightLLM through 1.2.0 visual_only deployments expose an unauthenticated RPyC service with allow_pickle enabled that deserializes attacker-supplied arguments in the remote_infer_images method. Attackers can reach the visual RPyC port and pass objects with __reduce__ methods to execute arbitrary code with service account privileges.
SSVC
Exploitation: poc Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 19:37 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
VulnCheck CNA
Impacted products
Vendor Product Version
ModelTC LightLLM Affected: 0 , ≤ 1.2.0 (semver)
Create a notification for this product.
Date Public
2026-09-30 00:00
Show details on NVD website

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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.