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.

2664 vulnerabilities reference this CWE, most recent first.

CVE-2026-114724 (GCVE-0-2026-114724)

Vulnerability from cvelistv5 – Published: 2026-10-22 01:48 – Updated: 2026-10-28 19:02
VLAI
Summary
Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 contains an object injection primitive in rcube_session::unserialize(). A session key prefixed with “!” was treated as having no value, and the reconstructed serialized string was emitted with a key but no corresponding value, desynchronizing the remainder of the input so that following session data was interpreted as a serialized value. This yields a PHP object injection primitive for an attacker able to influence stored session data. Upstream fixed this in the commit “Fix object injection primitive in rcube_session::unserialize() via “!”-prefixed session keys”, which rejects such keys.
Severity
7.4 (High)
CVSS:3.1/AV:L/AC:H/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 2026-10-28 19:01 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
mitre CNA
References
Impacted products
Vendor Product Version
Roundcube Webmail Affected: 1.6.0 , < 1.6.20 (semver)
Affected: 1.7.0 , < 1.7.5 (semver)
    cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
    cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-114704 (GCVE-0-2026-114704)

Vulnerability from cvelistv5 – Published: 2026-10-24 14:00 – Updated: 2026-10-24 14:46 X_Open Source
VLAI
Title
WordPress Relevanssi plugin <= 4.28.4 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in Christoph Vielgrader Relevanssi relevanssi allows Object Injection.This issue affects Relevanssi : from n/a through 4.28.4.
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 2026-10-24 14:40 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
Christoph Vielgrader Relevanssi Affected: 0 , ≤ 4.28.4 (custom)
Create a notification for this product.
Date Public
2026-10-22 13:20
Credits
Ananda Dhakal (Patchstack)
Show details on NVD website
To clipboard 

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CVE-2026-114624 (GCVE-0-2026-114624)

Vulnerability from cvelistv5 – Published: 2026-10-23 13:47 – Updated: 2026-10-29 13:37
VLAI
Title
baserCMS: PHP object injection via unguarded unserialize() in the widget-area entity
Summary
baserCMS is a website development framework. In versions 5.0.0 before 5.3.2 and 5.4.0 before 5.4.2, the widget-area entity serializes widgets only when the submitted value is an array, allowing a string submitted through the admin JSON API to be stored unchanged. Entity reads, including front-end rendering and API responses, deserialize the stored value with unserialize() without an allowed_classes restriction, accepting both raw and base64-encoded serialized data. An administrator, or an attacker who obtains widget-write capability through a separate vulnerability such as chained XSS, can plant an object graph that subsequently triggers on unauthenticated page requests. Two demonstrated gadget chains in the default dependency set use composer/composer ProcessExecutor::startJob() with Process::fromShellCommandline(), or logiscape/mcp-sdk-php StdioTransport::connect() with StdioServerParameters, to reach proc_open() and execute commands as the web-server user. Deserialization bypasses constructor-based readonly safeguards, and the stored payload can execute repeatedly until the database row is repaired. Unauthenticated page access is a trigger after privileged payload storage, not an unauthenticated means of initially planting the payload. This issue has been patched in versions 5.3.2 and 5.4.2.
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: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-29 13:36 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
GitHub_M CNA
References
Impacted products
Vendor Product Version
baserproject basercms Affected: >= 5.0.0, < 5.3.2
Affected: >= 5.4.0, < 5.4.2
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-114608 (GCVE-0-2026-114608)

Vulnerability from cvelistv5 – Published: 2026-10-22 16:50 – Updated: 2026-10-29 11:49
VLAI
Title
Pylint: Arbitrary code execution via pickle deserialization of the stats cache in PYLINT_HOME
Summary
Pylint is a static code analyser for Python. From 0.15.2 until 4.0.9, Pylint stores module statistics in predictable files under PYLINT_HOME and loads those files with pickle.load on a later run. An attacker who can write to a shared, group-writable, or otherwise untrusted cache directory can replace a stats cache with crafted serialized data, causing arbitrary code to execute with the privileges of the user who next runs Pylint. The default per-user cache is not normally writable by another user. This issue is fixed in version 4.0.9.
Severity
5.4 (Medium)
CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/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 2026-10-29 11:48 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
GitHub_M CNA
References
Impacted products
Vendor Product Version
pylint-dev pylint Affected: < 4.0.9
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-114403 (GCVE-0-2026-114403)

Vulnerability from cvelistv5 – Published: 2026-10-21 12:39 – Updated: 2026-10-28 16:31
VLAI
Title
PHPOffice PHPPresentation through 1.2.0 Deserialization via Reader\Serialized::load
Summary
PHPOffice PHPPresentation through 1.2.0 contains an insecure deserialization vulnerability that allows attackers to instantiate arbitrary PHP objects by supplying a crafted presentation file. Attackers can upload a ZIP containing PhpPresentation.xml that IOFactory::load passes to unserialize(), enabling gadget-chain code execution, file writes, or denial of service.
Severity
9.2 (Critical)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-28 16:30 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
VulnCheck CNA
References
Impacted products
Vendor Product Version
PHPOffice PHPPresentation Affected: 0 , ≤ 1.2.0 (semver)
Create a notification for this product.
Date Public
2026-10-09 09:59
Credits
leediay153 from Viettel Post
Show details on NVD website
To clipboard 

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CVE-2026-114198 (GCVE-0-2026-114198)

Vulnerability from cvelistv5 – Published: 2026-10-21 00:39 – Updated: 2026-10-21 17:19
VLAI
Title
Deserialization of untrusted data in floss
Summary
Deserialization of untrusted data in Mandiant FLARE floss releases before 3.2.0 allows arbitrary code execution when a crafted .viv or .exe.viv workspace is passed to the floss utility
Severity
8.7 (High)
CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-21 15:35 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
Mandiant CNA
References
Impacted products
Vendor Product Version
Mandiant FLARE floss Affected: 0 , < 3.2.0 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-114197 (GCVE-0-2026-114197)

Vulnerability from cvelistv5 – Published: 2026-10-21 00:39 – Updated: 2026-10-21 17:19
VLAI
Title
Deserialization of untrusted data in capa
Summary
Deserialization of untrusted data in Mandiant FLARE capa releases before 10.0.0 allows arbitrary code execution when a crafted .viv or .exe.viv workspace is passed to the capa utility
Severity
8.7 (High)
CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-21 15:36 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
Mandiant CNA
References
Impacted products
Vendor Product Version
Mandiant FLARE capa Affected: 0 , < 10.0.0 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-114196 (GCVE-0-2026-114196)

Vulnerability from cvelistv5 – Published: 2026-10-24 08:00 – Updated: 2026-10-24 14:46 X_Open Source
VLAI
Title
WordPress Paytium plugin <= 5.0.5 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in paytiumsupport Paytium paytium allows Object Injection.This issue affects Paytium: from n/a through 5.0.5.
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 2026-10-24 14:41 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
paytiumsupport Paytium Affected: 0 , ≤ 5.0.5 (custom)
Create a notification for this product.
Date Public
2026-10-22 08:00
Credits
Tarcísio Luchesi(Poystick) | Patchstack Bug Bounty Program
Show details on NVD website
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CVE-2026-113779 (GCVE-0-2026-113779)

Vulnerability from cvelistv5 – Published: 2026-10-21 14:06 – Updated: 2026-10-21 15:47
VLAI
Title
pfSense REST API package Vulnerable to Privilege Escalation via Scoped HA Settings Sync Permission
Summary
The pfSense REST API package is an unofficial, open-source REST and GraphQL API for pfSense CE and pfSense Plus firewalls. A privilege escalation vulnerability in pfSense-pkg-RESTAPI prior to version 2.9.0 allows authenticated accounts holding the dedicated settings sync permission to modify REST API configuration secrets. This enables a non-administrative user to elevate their privileges to a full administrator. pfSense-pkg-RESTAPI 2.9.0 patches the issue. Access to the HA settings sync endpoint now strictly requires full administrative privileges (`page-all`). The sub-administrative sync privilege has been removed in versions v2.9.0 and later. In addition to correcting the access control boundary, version 2.9.0 includes the following hardening measures: opt-in default and format and validation modernization. As a workaround, one may mitigate exposure by taking either or all of the following steps. Revoke Scoped Permissions: Remove the `api-v2-system-restapi-settings-sync-post` privilege from all non-administrative users. Apply ACLs: Configure REST API Access Control Lists (ACLs) and/or firewall rules to restrict access to API endpoints exclusively to trusted administrator and HA peer IP addresses.
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 2026-10-21 15:06 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
GitHub_M CNA
References
Impacted products
Show details on NVD website
To clipboard 

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CVE-2026-113404 (GCVE-0-2026-113404)

Vulnerability from cvelistv5 – Published: 2026-10-20 06:24 – Updated: 2026-10-20 16:11
VLAI
Title
Uniong｜WebITR - Insecure Deserialization
Summary
WebITR developed by Uniong has a Insecure Deserialization vulnerability. Authenticated remote attackers can use the hard-coded cryptographic key to craft and submit malicious serialized data, thereby executing arbitrary code on the server.
Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
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 2026-10-20 16:11 UTC
CWE
Assigner
twcert CNA
References
Impacted products
Vendor Product Version
Uniong WebITR Affected: 0 , ≤ 2_1_0_34 (custom)
Create a notification for this product.
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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