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.

4925 vulnerabilities reference this CWE, most recent first.

CVE-2026-66713 (GCVE-0-2026-66713)

Vulnerability from cvelistv5 – Published: 2026-07-28 13:44 – Updated: 2026-07-29 03:55
VLAI
Title
Apache Axis2/Java: deserialization of untrusted Data
Summary
Deserialization of Untrusted Data (CWE-502) in the Tribes-based clustering component  in Apache Software Foundation Apache Axis2/Java through 2.0.0 on Apache Tomcat  (only when Tribes clustering is enabled, which is off by default) allows an  unauthenticated remote attacker with network access to the clustering port to  execute arbitrary code via a crafted serialized Java object delivered to the cluster  channel and deserialized in  org.apache.axis2.clustering.tribes.Axis2ChannelListener#messageReceived. Users are  recommended to upgrade to version 2.0.1, which fixes this issue by removing the  clustering feature entirely.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
Impacted products
Vendor Product Version
Apache Software Foundation Apache Axis2/Java Affected: 0 , ≤ 2.0.0 (semver)
Create a notification for this product.
Credits
liuhuajin of Huawei
Show details on NVD website

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CVE-2026-65883 (GCVE-0-2026-65883)

Vulnerability from cvelistv5 – Published: 2026-07-29 09:34 – Updated: 2026-07-29 14:39
VLAI
Title
Joomla Extension - aimy-extensions.com - RCE via PHP object injection in Aimy Captcha-Less Form Guard 18.0 - 20.0
Summary
Joomla Extension - aimy-extensions.com - RCE via PHP object injection in Aimy Captcha-Less Form Guard 18.0 - 20.0 - A forged clfgd field allows PHP objection injection and thereby remote code execution.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Show details on NVD website

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CVE-2026-65617 (GCVE-0-2026-65617)

Vulnerability from cvelistv5 – Published: 2026-07-27 19:37 – Updated: 2026-07-27 19:59
VLAI
Title
Potential remote code execution on an Artifactory package service container.
Summary
A deserialization weakness in JFrog Artifactory package handling could allow a low-privileged user to impact confidentiality, integrity, and availability under specific repository conditions.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
Impacted products
Vendor Product Version
jfrog artifactory Affected: 0 , < 7.111.18 (custom)
Affected: 7.117.0 , < 7.117.25 (custom)
Affected: 7.125.0 , < 7.125.18 (custom)
Affected: 7.133.0 , < 7.133.27 (custom)
Affected: 7.146.0 , < 7.146.34 (custom)
Affected: 7.161.0 , < 7.161.15 (custom)
Create a notification for this product.
Credits
Kostya Kortchinsky | OpenAI
Show details on NVD website

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CVE-2026-65581 (GCVE-0-2026-65581)

Vulnerability from cvelistv5 – Published: 2026-08-06 14:27 – Updated: 2026-08-06 19:17
VLAI
Title
WordPress AI ANN theme <= 1.29.0 - PHP Object Injection vulnerability
Summary
Unauthenticated PHP Object Injection in AI ANN <= 1.29.0 versions.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
Axiomthemes AI ANN Affected: n/a , ≤ 1.29.0 (custom)
Create a notification for this product.
Credits
João Pedro S Alcântara (Kinorth) | Patchstack Bug Bounty Program
Show details on NVD website

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CVE-2026-65579 (GCVE-0-2026-65579)

Vulnerability from cvelistv5 – Published: 2026-08-06 14:27 – Updated: 2026-08-06 14:55
VLAI
Title
WordPress Agricola theme <= 1.21.0 - PHP Object Injection vulnerability
Summary
Unauthenticated PHP Object Injection in Agricola <= 1.21.0 versions.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
axiomthemes Agricola Affected: n/a , ≤ 1.21.0 (custom)
Create a notification for this product.
Credits
Bonds | Patchstack Bug Bounty Program
Show details on NVD website

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CVE-2026-65578 (GCVE-0-2026-65578)

Vulnerability from cvelistv5 – Published: 2026-08-06 14:27 – Updated: 2026-08-06 15:35
VLAI
Title
WordPress Agora theme <= 1.9 - PHP Object Injection vulnerability
Summary
Unauthenticated PHP Object Injection in Agora <= 1.9 versions.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
AncoraThemes Agora Affected: n/a , ≤ 1.9 (custom)
Create a notification for this product.
Credits
Bonds | Patchstack Bug Bounty Program
Show details on NVD website

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CVE-2026-65577 (GCVE-0-2026-65577)

Vulnerability from cvelistv5 – Published: 2026-08-06 14:27 – Updated: 2026-08-06 16:53
VLAI
Title
WordPress Advice theme <= 1.18.0 - PHP Object Injection vulnerability
Summary
Unauthenticated PHP Object Injection in Advice <= 1.18.0 versions.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
AncoraThemes Advice Affected: n/a , ≤ 1.18.0 (custom)
Create a notification for this product.
Credits
Bonds | Patchstack Bug Bounty Program
Show details on NVD website

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CVE-2026-65576 (GCVE-0-2026-65576)

Vulnerability from cvelistv5 – Published: 2026-08-06 14:27 – Updated: 2026-08-06 15:24
VLAI
Title
WordPress Adrena theme <= 1.2.14 - PHP Object Injection vulnerability
Summary
Unauthenticated PHP Object Injection in Adrena <= 1.2.14 versions.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
AncoraThemes Adrena Affected: n/a , ≤ 1.2.14 (custom)
Create a notification for this product.
Credits
Bonds | Patchstack Bug Bounty Program
Show details on NVD website

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CVE-2026-65575 (GCVE-0-2026-65575)

Vulnerability from cvelistv5 – Published: 2026-08-06 14:27 – Updated: 2026-08-06 19:30
VLAI
Title
WordPress Accalia theme <= 1.5.3 - PHP Object Injection vulnerability
Summary
Unauthenticated PHP Object Injection in Accalia <= 1.5.3 versions.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
AncoraThemes Accalia Affected: n/a , ≤ 1.5.3 (custom)
Create a notification for this product.
Credits
João Pedro S Alcântara (Kinorth) | Patchstack Bug Bounty Program
Show details on NVD website

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CVE-2026-65574 (GCVE-0-2026-65574)

Vulnerability from cvelistv5 – Published: 2026-08-06 14:27 – Updated: 2026-08-06 14:55
VLAI
Title
WordPress Abogado theme <= 1.18 - PHP Object Injection vulnerability
Summary
Unauthenticated PHP Object Injection in Abogado <= 1.18 versions.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
AncoraThemes Abogado Affected: n/a , ≤ 1.18 (custom)
Create a notification for this product.
Credits
Bonds | Patchstack Bug Bounty Program
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.