Common Weakness Enumeration

CWE-502

Allowed

Deserialization of Untrusted Data

Abstraction: Base · Status: Draft

API response cwe.mitre.org

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

2663 vulnerabilities reference this CWE, most recent first.

CVE-2026-116867 (GCVE-0-2026-116867)

Vulnerability from cvelistv5 – Published: 2026-10-29 15:24 – Updated: 2026-10-29 17:15
VLAI
Title
WordPress Dynamic QR Code – generator plugin <= 1.0.1 - PHP Object Injection vulnerability
Summary
Contributor PHP Object Injection in Dynamic QR Code &#8211; generator <= 1.0.1 versions.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-29 16:28 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
sosidee Dynamic QR Code &#8211; generator Affected: n/a , ≤ 1.0.1 (custom)
Create a notification for this product.
Credits
Ananda Dhakal (Patchstack) | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-116866 (GCVE-0-2026-116866)

Vulnerability from cvelistv5 – Published: 2026-10-29 15:24 – Updated: 2026-10-30 18:50
VLAI
Title
WordPress Extra Fees Plugin for WooCommerce plugin <= 4.4.0 - PHP Object Injection vulnerability
Summary
Contributor PHP Object Injection in Extra Fees Plugin for WooCommerce <= 4.4.0 versions.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 18:36 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
Dotstore Extra Fees Plugin for WooCommerce Affected: n/a , ≤ 4.4.0 (custom)
Create a notification for this product.
Credits
Ananda Dhakal (Patchstack) | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-116865 (GCVE-0-2026-116865)

Vulnerability from cvelistv5 – Published: 2026-10-29 15:24 – Updated: 2026-10-30 18:50
VLAI
Title
WordPress Zippy plugin <= 1.7.0 - PHP Object Injection vulnerability
Summary
Editor PHP Object Injection in Zippy <= 1.7.0 versions.
Severity
7.2 (High)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 18:36 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
Gesundheit Bewegt GmbH Zippy Affected: n/a , ≤ 1.7.0 (custom)
Create a notification for this product.
Credits
Ananda Dhakal (Patchstack) | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-116864 (GCVE-0-2026-116864)

Vulnerability from cvelistv5 – Published: 2026-10-29 15:24 – Updated: 2026-10-30 18:50
VLAI
Title
WordPress WPCargo Track & Trace plugin <= 8.0.5 - PHP Object Injection vulnerability
Summary
Author PHP Object Injection in WPCargo Track & Trace <= 8.0.5 versions.
Severity
7.2 (High)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 18:36 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
Arni Cinco WPCargo Track & Trace Affected: n/a , ≤ 8.0.5 (custom)
Create a notification for this product.
Credits
Ananda Dhakal (Patchstack) | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-116580 (GCVE-0-2026-116580)

Vulnerability from cvelistv5 – Published: 2026-10-26 20:35 – Updated: 2026-11-02 18:11
VLAI
Title
Seroval: Deserialization invokes attacker-chosen callables: AsyncIteratorFactoryInstance calls source.on(listener) without type check
Summary
Seroval facilitates JavaScript value stringification, including complex structures beyond JSON.stringify capabilities. Prior to 1.6.8, fromJSON rebuilds an AsyncIteratorFactoryInstance by calling source.on(listener) without requiring source to be a genuine internal stream. With untrusted Seroval input and an application plugin that returns a callable value or an object exposing an on method, a crafted node can reuse an identifier so the deserializer invokes the plugin-produced value. This is an incomplete-fix variant of CVE-2026-59940. The resulting confidentiality, integrity, or availability impact depends on the behavior exposed by the application plugin. This issue is fixed in version 1.6.8.
Severity
7.3 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-02 18:11 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
GitHub_M CNA
References
Impacted products
Vendor Product Version
lxsmnsyc seroval Affected: < 1.6.8
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-116500 (GCVE-0-2026-116500)

Vulnerability from cvelistv5 – Published: 2026-11-08 17:04 – Updated: 2026-11-08 17:04
VLAI
Title
Unbound Recursion in QPY deserialization can lead to denial of service
Summary
IBM Qiskit SDK 2.4.0 through 2.6.1 could allow a local attacker to cause a denial of service due to unbound recursion during deserialization of untrusted QPY payloads.
Severity
6.2 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
ibm CNA
References
URL Tags
https://www.ibm.com/support/pages/node/7295235 vendor-advisorypatch
Impacted products
Vendor Product Version
IBM Qiskit SDK Affected: 2.4.0 , ≤ 2.6.1 (semver)
    cpe:2.3:a:ibm:qiskit_sdk:2.4.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:qiskit_sdk:2.6.1:*:*:*:*:*:*:*
Create a notification for this product.
Credits
The vulnerability was reported to IBM by Nathan Rebello.
Show details on NVD website
To clipboard 

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CVE-2026-116499 (GCVE-0-2026-116499)

Vulnerability from cvelistv5 – Published: 2026-11-08 17:03 – Updated: 2026-11-09 01:21
VLAI
Title
Arbitrary Code Execution in Qiskit SDK QPY Deserialization
Summary
IBM Qiskit SDK 1.4.2 through 2.6.2 could allow a local attacker to execute arbitrary code due to deserialization of untrusted data.
Severity
8.4 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-09 01:21 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
ibm CNA
References
URL Tags
https://www.ibm.com/support/pages/node/7295238 vendor-advisorypatch
Impacted products
Vendor Product Version
IBM Qiskit SDK Affected: 1.4.2 , ≤ 2.6.2 (semver)
    cpe:2.3:a:ibm:qiskit_sdk:1.4.2:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:qiskit_sdk:2.6.2:*:*:*:*:*:*:*
Create a notification for this product.
Credits
The vulnerability was reported to IBM by Nathan Rebello.
Show details on NVD website
To clipboard 

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CVE-2026-116392 (GCVE-0-2026-116392)

Vulnerability from cvelistv5 – Published: 2026-10-28 13:00 – Updated: 2026-10-29 13:47 X_Open Source
VLAI
Title
WordPress Accordion plugin <= 2.3.25 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in PickPlugins Accordion accordions allows Object Injection.This issue affects Accordion: from n/a through 2.3.25.
Severity
7.2 (High)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-29 13:41 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
PickPlugins Accordion Affected: 0 , ≤ 2.3.25 (custom)
Create a notification for this product.
Date Public
2026-10-26 12:55
Credits
Ananda Dhakal (Patchstack)
Show details on NVD website
To clipboard 

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CVE-2026-116391 (GCVE-0-2026-116391)

Vulnerability from cvelistv5 – Published: 2026-10-28 13:00 – Updated: 2026-10-29 13:47 X_Open Source
VLAI
Title
WordPress GS Logo Slider plugin <= 3.8.9 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in GS Plugins GS Logo Slider gs-logo-slider allows Object Injection.This issue affects GS Logo Slider: from n/a through 3.8.9.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-29 13:41 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
GS Plugins GS Logo Slider Affected: 0 , ≤ 3.8.9 (custom)
Create a notification for this product.
Date Public
2026-10-26 12:56
Credits
Ananda Dhakal (Patchstack)
Show details on NVD website
To clipboard 

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CVE-2026-116390 (GCVE-0-2026-116390)

Vulnerability from cvelistv5 – Published: 2026-10-28 14:02 – Updated: 2026-10-29 13:47 X_Open Source
VLAI
Title
WordPress Filter Everything — WordPress & WooCommerce Filters plugin <= 1.9.7 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in stepasyuk Filter Everything — WordPress & WooCommerce Filters filter-everything allows Object Injection.This issue affects Filter Everything — WordPress & WooCommerce Filters: from n/a through 1.9.7.
Severity
7.2 (High)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-29 13:41 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Date Public
2026-10-26 13:04
Credits
Ananda Dhakal (Patchstack)
Show details on NVD website
To clipboard 

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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.

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