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.

5541 vulnerabilities reference this CWE, most recent first.

CVE-2026-81283 (GCVE-0-2026-81283)

Vulnerability from cvelistv5 – Published: 2026-09-02 11:37 – Updated: 2026-09-02 12:35
VLAI
Title
WordPress WP User Frontend plugin <= 4.3.10 - PHP Object Injection vulnerability
Summary
Subscriber PHP Object Injection in WP User Frontend <= 4.3.10 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 2026-09-02 12:35 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
weDevs WP User Frontend Affected: n/a , ≤ 4.3.10 (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-2026-80428 (GCVE-0-2026-80428)

Vulnerability from cvelistv5 – Published: 2026-08-26 15:44 – Updated: 2026-09-30 16:39
VLAI
Title
ILIAS PHP Object Injection via Shibboleth Logout
Summary
ILIAS before versions 9.22, 10.10, and 11.3 contains an unauthenticated PHP object injection vulnerability that allows unauthenticated attackers to execute arbitrary code by injecting serialized objects through the LTI authentication endpoint and triggering deserialization via the Shibboleth back-channel logout endpoint. Attackers can write arbitrary serialized objects into session storage, then exploit an available POP gadget through the logout endpoint's unrestricted deserialization to write attacker-controlled PHP content to a web-accessible path and achieve remote code execution as the web server user.
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 · CISA-ADP (v2.0.3)
Decision recorded 2026-08-29 02:41 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
ILIAS-eLearning e.V. ILIAS Affected: 9.0 , < 9.22 (custom)
Affected: 10.0 , < 10.10 (custom)
Affected: 11.0 , < 11.3 (custom)
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    cpe:2.3:a:ilias:ilias:*:*:*:*:*:*:*:*
    cpe:2.3:a:ilias:ilias:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-08-26 00:00
Credits
André Schweigert
Show details on NVD website
To clipboard 

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CVE-2026-79657 (GCVE-0-2026-79657)

Vulnerability from cvelistv5 – Published: 2026-08-25 11:33 – Updated: 2026-10-08 15:25
VLAI
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
9.3 (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: 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
Impacted products
Vendor Product Version
nltk nltk Affected: 0 , < 3.10.3 (semver)
Unaffected: 3.10.3 (semver)
    cpe:2.3:a:nltk:nltk:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-08-11 00:00
Credits
leduckhuong
Show details on NVD website
To clipboard 

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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
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
9.4 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
9.6 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
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
Impacted products
Vendor Product Version
nltk nltk Affected: 0 , < 3.10.0 (semver)
Unaffected: 3.10.0 (semver)
    cpe:2.3:a:nltk:nltk:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-08-11 00:00
Credits
ekaf
Show details on NVD website
To clipboard 

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CVE-2026-78614 (GCVE-0-2026-78614)

Vulnerability from cvelistv5 – Published: 2026-08-27 23:26 – Updated: 2026-08-28 16:40
VLAI
Title
Dimension SQL Injection in Audit Report
Summary
WatchGuard Dimension contains an authenticated SQL injection vulnerability in the audit report feature which allows an authenticated user with report administration permissions gain arbitrary command execution as the Dimension WebUI process user by sending specially crafted requests.
Severity
8.6 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 16:39 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
WatchGuard Dimension Affected: 2.0 , < 2.3.1 (semver)
    cpe:2.3:a:watchguard:dimension:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
Yukusawa18
Show details on NVD website
To clipboard 

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CVE-2026-78612 (GCVE-0-2026-78612)

Vulnerability from cvelistv5 – Published: 2026-08-27 23:26 – Updated: 2026-08-28 16:26
VLAI
Title
Dimension SQL Injection in Scheduled Report
Summary
WatchGuard Dimension contains an authenticated SQL injection vulnerability in the scheduled report feature which allows an authenticated user with report administration permissions gain arbitrary command execution as the Dimension WebUI process user by sending specially crafted requests.
Severity
8.6 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 16:26 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version
WatchGuard Dimension Affected: 2.0 , < 2.3.1 (semver)
    cpe:2.3:a:watchguard:dimension:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
Yukusawa18
Show details on NVD website
To clipboard 

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CVE-2026-78406 (GCVE-0-2026-78406)

Vulnerability from cvelistv5 – Published: 2026-10-08 21:02 – Updated: 2026-10-09 11:53
VLAI
Title
Security vulnerabilities have been found in IBM Verify Identity Access and IBM Security Verify Access
Summary
IBM Security Verify Access 10.0 through 10.0.9.2 and IBM Verify Identity Access 11.0 through 11.0.3 could allow a remote unauthenticated attacker to execute arbitrary code on the system due to the deserialization of untrusted data.
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 · CISA-ADP (v2.0.3)
Decision recorded 2026-10-09 11:52 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
URL Tags
https://www.ibm.com/support/pages/node/7291628 vendor-advisorypatch
Impacted products
Vendor Product Version
IBM Security Verify Access Affected: 10.0 , ≤ 10.0.9.2 (semver)
    cpe:2.3:a:ibm:security_verify_access:10.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:security_verify_access:10.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:security_verify_access:10.0.9.2:*:*:*:*:*:*:*
Create a notification for this product.
IBM Verify Identity Access Affected: 11.0 , ≤ 11.0.3 (semver)
    cpe:2.3:a:ibm:verify_identity_access:11.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:verify_identity_access:11.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:verify_identity_access:11.0.3:*:*:*:*:*:*:*
Create a notification for this product.
IBM Security Verify Access Container Affected: 10.0 , ≤ 10.0.9.2 (semver)
    cpe:2.3:a:ibm:security_verify_access_container:10.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:security_verify_access_container:10.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:security_verify_access_container:10.0.9.2:*:*:*:*:*:*:*
Create a notification for this product.
IBM Verify Identity Access Container Affected: 11.0 , ≤ 11.0.3 (semver)
    cpe:2.3:a:ibm:verify_identity_access_container:11.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:verify_identity_access_container:11.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:verify_identity_access_container:11.0.3:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website
To clipboard 

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            "confidentialityImpact": "HIGH",
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          "supportingMedia": [
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              "value": "\u003cp\u003e\u003cstrong\u003eIBM encourages customers to update their systems promptly.\u003c/strong\u003e\u003c/p\u003e\u003cp\u003e\u003c/p\u003e\u003cp\u003e\u003cstrong\u003eAppliance:\u003c/strong\u003e\u003c/p\u003e\u003cdiv\u003e\u003ctable\u003e\u003cthead\u003e\u003ctr\u003e\u003ctd\u003e\u003cp\u003e\u003cstrong\u003eAffected Products\u003c/strong\u003e\u003c/p\u003e\u003c/td\u003e\u003ctd\u003e\u003cp\u003e\u003cstrong\u003eFix availability\u003c/strong\u003e\u003c/p\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003e\u003cp\u003eIBM Verify Identity Access\u003c/p\u003e\u003c/td\u003e\u003ctd\u003e\u003cp\u003e\u003ca href=\"https://www.ibm.com/support/fixcentral/swg/selectFixes?product=ibm%2FTivoli%2FIBM+Verify+Identity+Access\u0026amp;fixids=11.0.3-ISS-IVIA-FP0001\u0026amp;source=dbluesearch\u0026amp;function=fixId\u0026amp;parent=IBM%20Security\" rel=\"nofollow\"\u003eDownload IBM Verify Identity Access v11.0.3.1\u003c/a\u003e\u003c/p\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003e\u003cp\u003eIBM Security Verify Access\u003c/p\u003e\u003c/td\u003e\u003ctd\u003e\u003cp\u003e\u003ca href=\"https://www.ibm.com/support/fixcentral/quickorder?product=ibm%2FTivoli%2FIBM+Security+Verify+Access\u0026amp;fixids=10.0.9-ISS-ISVA-FP0003\u0026amp;source=SAR\" rel=\"nofollow\"\u003eDownload IBM Security Verify Access v10.0.9.3\u003c/a\u003e\u003c/p\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/thead\u003e\u003c/table\u003e\u003c/div\u003e\u003cp\u003e\u003c/p\u003e\u003cp\u003e\u003cstrong\u003eContainer:\u003c/strong\u003e\u003c/p\u003e\u003cp\u003e\u003ca href=\"https://docs.verify.ibm.com/ibm-security-verify-access/docs/containers\" rel=\"nofollow\"\u003eContainer Download\u003c/a\u003e\u003c/p\u003e"
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        }
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    "datePublished": "2026-10-08T21:02:47.142Z",
    "dateReserved": "2026-08-24T14:22:42.606Z",
    "dateUpdated": "2026-10-09T11:53:45.510Z",
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CVE-2026-78401 (GCVE-0-2026-78401)

Vulnerability from cvelistv5 – Published: 2026-10-08 21:02 – Updated: 2026-10-08 21:02
VLAI
Title
Security vulnerabilities have been found in IBM Verify Identity Access and IBM Security Verify Access
Summary
IBM Security Verify Access 10.0 through 10.0.9.2 and IBM Verify Identity Access 11.0 through 11.0.3 could allow a remote unauthenticated attacker to execute arbitrary code on the system due to the deserialization of untrusted data.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
URL Tags
https://www.ibm.com/support/pages/node/7291628 vendor-advisorypatch
Impacted products
Vendor Product Version
IBM Security Verify Access Affected: 10.0 , ≤ 10.0.9.2 (semver)
    cpe:2.3:a:ibm:security_verify_access:10.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:security_verify_access:10.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:security_verify_access:10.0.9.2:*:*:*:*:*:*:*
Create a notification for this product.
IBM Verify Identity Access Affected: 11.0 , ≤ 11.0.3 (semver)
    cpe:2.3:a:ibm:verify_identity_access:11.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:verify_identity_access:11.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:verify_identity_access:11.0.3:*:*:*:*:*:*:*
Create a notification for this product.
IBM Security Verify Access Container Affected: 10.0 , ≤ 10.0.9.2 (semver)
    cpe:2.3:a:ibm:security_verify_access_container:10.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:security_verify_access_container:10.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:security_verify_access_container:10.0.9.2:*:*:*:*:*:*:*
Create a notification for this product.
IBM Verify Identity Access Container Affected: 11.0 , ≤ 11.0.3 (semver)
    cpe:2.3:a:ibm:verify_identity_access_container:11.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:verify_identity_access_container:11.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:verify_identity_access_container:11.0.3:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-78292 (GCVE-0-2026-78292)

Vulnerability from cvelistv5 – Published: 2026-08-27 09:00 – Updated: 2026-08-27 15:01
VLAI
Title
WordPress Hash Form plugin <= 1.4.1 - PHP Object Injection vulnerability
Summary
Unauthenticated PHP Object Injection in Hash Form <= 1.4.1 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 · CISA-ADP (v2.0.3)
Decision recorded 2026-08-27 15:01 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
hashthemes Hash Form Affected: n/a , ≤ 1.4.1 (custom)
Create a notification for this product.
Credits
Supakiad S. (m3ez) | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-78286 (GCVE-0-2026-78286)

Vulnerability from cvelistv5 – Published: 2026-08-27 09:00 – Updated: 2026-08-28 18:35
VLAI
Title
WordPress Geo Controller plugin <= 8.9.8 - PHP Object Injection vulnerability
Summary
Unauthenticated PHP Object Injection in Geo Controller <= 8.9.8 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 · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 18:19 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
INFINITUM FORM Geo Controller Affected: n/a , ≤ 8.9.8 (custom)
Create a notification for this product.
Credits
Supakiad S. (m3ez) | Patchstack Bug Bounty Program
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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