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.

4836 vulnerabilities reference this CWE, most recent first.

CVE-2026-65497 (GCVE-0-2026-65497)

Vulnerability from cvelistv5 – Published: 2026-07-23 11:19 – Updated: 2026-07-23 15:08
VLAI
Title
WordPress Complianz plugin <= 7.5.0 - PHP Object Injection vulnerability
Summary
Administrator PHP Object Injection in Complianz <= 7.5.0 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 (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
Complianz Complianz Affected: n/a , ≤ 7.5.0 (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-2026-65493 (GCVE-0-2026-65493)

Vulnerability from cvelistv5 – Published: 2026-07-23 11:18 – Updated: 2026-07-23 14:51
VLAI
Title
WordPress Dokan Pro plugin <= 5.0.2 - PHP Object Injection vulnerability
Summary
Subscriber PHP Object Injection in Dokan Pro <= 5.0.2 versions.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
Dokan Dokan Pro Affected: n/a , ≤ 5.0.2 (custom)
Create a notification for this product.
Credits
Expatch | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-64608 (GCVE-0-2026-64608)

Vulnerability from cvelistv5 – Published: 2026-07-21 09:34 – Updated: 2026-07-21 18:28
VLAI
Title
Apache Fory: Heap type confusion and out-of-bounds read/write in C++ compatible-mode field-skip paths
Summary
Heap type confusion and out-of-bounds read/write in the Apache Fory C++ implementation. When deserializing data in compatible mode, the field-skip paths do not correctly validate the declared field types against the actual data, so input with an inconsistent schema can cause type confusion and out-of-bounds memory access. Only the C++ implementation is affected; other language implementations of Apache Fory are not. This issue affects Apache Fory C++: from 0.14.0 before 1.4.0. Users are recommended to upgrade to version 1.4.0, which fixes the issue.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-843 - Access of Resource Using Incompatible Type ('Type Confusion')
  • CWE-787 - Out-of-bounds Write
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
Apache Software Foundation Apache Fory Affected: 0.14.0 , < 1.4.0 (semver)
Create a notification for this product.
Credits
Nguyen Van Hiep (@hypnguyen1209) from MBBank
Show details on NVD website
To clipboard 

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CVE-2026-64606 (GCVE-0-2026-64606)

Vulnerability from cvelistv5 – Published: 2026-07-21 10:43 – Updated: 2026-07-21 18:28
VLAI
Title
Apache Fory, Apache Fory: Class-registration bypass through an auto-admitted SerializedLambda capturing interface
Summary
Deserialization of untrusted data vulnerability that may allow class-registration checks to be bypassed during Java lambda deserialization. Only lambda capture class is affected This issue affects Apache Fory: from before 1.4.0. Users are recommended to upgrade to version 1.4.0, which fixes the issue.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Credits
Charles Vosburgh
Show details on NVD website
To clipboard 

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CVE-2026-63767 (GCVE-0-2026-63767)

Vulnerability from cvelistv5 – Published: 2026-07-20 19:13 – Updated: 2026-07-21 12:42 X_Open Source
VLAI
Title
ktransformers Unauthenticated Pickle Deserialization RCE via ZMQ
Summary
ktransformers through 0.6.3, fixed in commit def0f93, contains an unauthenticated pickle deserialization vulnerability that allows remote attackers to execute arbitrary commands by sending crafted pickle payloads to the SchedulerServer ZMQ ROUTER socket bound to all interfaces. Attackers can exploit malicious __reduce__ methods embedded in crafted pickle payloads to execute arbitrary shell commands as the server process.
Severity
9.3 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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
kvcache-ai ktransformers Affected: 0 , ≤ 0.6.3 (semver)
Unaffected: def0f9313d6e063b5c5ccdfa1f6707f7a40dfdca (git)
Create a notification for this product.
Date Public
2026-07-13 00:00
Credits
George Chen
Show details on NVD website
To clipboard 

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CVE-2026-59827 (GCVE-0-2026-59827)

Vulnerability from cvelistv5 – Published: 2026-07-09 17:43 – Updated: 2026-07-09 18:24
VLAI
Title
Metabase: Unsafe Deserialization of H2 Query Results
Summary
Metabase is an open-source business intelligence and embedded analytics tool. Prior to 1.58.15, 1.59.12, 1.60.6.3, and 1.61.1.4, Metabase instances with an H2 database connection, including the default sample database, deserialize arbitrary Java objects returned in H2 native query result columns of type OTHER without validation, allowing an authenticated user who can run native H2 queries to execute code on the Metabase server. This issue is fixed in versions 1.58.15, 1.59.12, 1.60.6.3, and 1.61.1.4.
Severity
9.9 (Critical)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
metabase metabase Affected: >= 1.58.0, < 1.58.15
Affected: >= 1.59.0, < 1.59.12
Affected: >= 1.60.0, < 1.60.6.3
Affected: >= 1.61.0, < 1.61.1.4
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-59544 (GCVE-0-2026-59544)

Vulnerability from cvelistv5 – Published: 2026-07-23 11:18 – Updated: 2026-07-23 13:31
VLAI
Title
WordPress Thrive Quiz Builder plugin <= 10.9.3.0 - PHP Object Injection vulnerability
Summary
Unauthenticated PHP Object Injection in Thrive Quiz Builder <= 10.9.3.0 versions.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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
Thrive Themes Coupon Thrive Quiz Builder Affected: n/a , ≤ 10.9.3.0 (custom)
Create a notification for this product.
Credits
VanTastic | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-59521 (GCVE-0-2026-59521)

Vulnerability from cvelistv5 – Published: 2026-07-13 08:41 – Updated: 2026-07-13 14:20
VLAI
Title
WordPress Real Testimonials plugin <= 3.1.15 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in ShapedPlugin LLC Real Testimonials testimonial-free allows Object Injection.This issue affects Real Testimonials: from n/a through <= 3.1.15.
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 (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
ShapedPlugin LLC Real Testimonials Affected: 0 , ≤ 3.1.15 (custom)
Create a notification for this product.
Date Public
2026-07-13 10:37
Credits
Ananda Dhakal (Patchstack)
Show details on NVD website
To clipboard 

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CVE-2026-59518 (GCVE-0-2026-59518)

Vulnerability from cvelistv5 – Published: 2026-07-13 08:41 – Updated: 2026-07-13 14:28
VLAI
Title
WordPress Directorist plugin <= 8.8.2 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in wpWax Directorist directorist allows Object Injection.This issue affects Directorist: from n/a through <= 8.8.2.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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
wpWax Directorist Affected: 0 , ≤ 8.8.2 (custom)
Create a notification for this product.
Date Public
2026-07-13 10:37
Credits
dutafi | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-58644 (GCVE-0-2026-58644)

Vulnerability from cvelistv5 – Published: 2026-07-14 17:05 – Updated: 2026-07-24 19:31
VLAI
Title
Microsoft SharePoint Remote Code Execution Vulnerability
Summary
Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
SSVC
Exploitation: active Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Date Public
2026-07-14 14:00
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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