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.

4797 vulnerabilities reference this CWE, most recent first.

CVE-2026-40357 (GCVE-0-2026-40357)

Vulnerability from cvelistv5 – Published: 2026-05-12 16:59 – Updated: 2026-06-19 16:12
VLAI
Title
Microsoft SharePoint Server Remote Code Execution Vulnerability
Summary
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Date Public
2026-05-12 14:00
Show details on NVD website
To clipboard 

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CVE-2026-40048 (GCVE-0-2026-40048)

Vulnerability from cvelistv5 – Published: 2026-04-27 07:53 – Updated: 2026-07-15 01:01
VLAI
Title
Apache Camel PQC: Unsafe Deserialization from FileBasedKeyLifecycleManager
Summary
The Camel-PQC FileBasedKeyLifecycleManager class deserializes the contents of `<keyId>.key` files in the configured key directory using java.io.ObjectInputStream without applying any ObjectInputFilter or class-loading restrictions. The cast to `java.security.KeyPair` is evaluated only after `readObject()` has already returned, so any `readObject()` side effects in the deserialized object run before the type check. An attacker who can write to the key directory used by a Camel application — for example through a path traversal into the directory, misconfigured filesystem permissions on the volume where keys are stored, a compromised key provisioning pipeline, or a symlink attack — can place a crafted serialized Java object that, when deserialized during normal key lifecycle operations, results in arbitrary code execution in the context of the application. This issue affects Apache Camel: from 4.19.0 before 4.20.0, from 4.18.0 before 4.18.2. Users are recommended to upgrade to version 4.20.0, which fixes the issue by replacing java.io.ObjectInputStream-based key and metadata storage with standard PKCS#8 (private key) / X.509 SubjectPublicKeyInfo (public key) Base64 JSON encoding. For users on the 4.18.x LTS releases stream, upgrade to 4.18.2.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/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
Apache Software Foundation Apache Camel PQC Affected: 4.19.0 , < 4.20.0 (semver)
Affected: 4.18.0 , < 4.18.2 (semver)
Create a notification for this product.
Red Hat Red Hat build of Apache Camel for Spring Boot 4     cpe:/a:redhat:camel_spring_boot:4
 Create a notification for this product.
Credits
Andrea Cosentino from ASF Venkatraman Kumar from Securin
Show details on NVD website
To clipboard 

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CVE-2026-40044 (GCVE-0-2026-40044)

Vulnerability from cvelistv5 – Published: 2026-04-13 18:11 – Updated: 2026-05-12 01:46
VLAI
Title
Pachno 1.0.6 FileCache Deserialization Remote Code Execution
Summary
Pachno 1.0.6 contains a deserialization vulnerability that allows unauthenticated attackers to execute arbitrary code by injecting malicious serialized objects into cache files. Attackers can write PHP object payloads to world-writable cache files with predictable names in the cache directory, which are unserialized during framework bootstrap before authentication checks occur.
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
Pachno Pachno Affected: 1.0.6
Create a notification for this product.
Date Public
2026-04-12 00:00
Credits
LiquidWorm as Gjoko Krstic of Zero Science Lab
Show details on NVD website
To clipboard 

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CVE-2026-39890 (GCVE-0-2026-39890)

Vulnerability from cvelistv5 – Published: 2026-04-08 20:45 – Updated: 2026-04-09 16:16
VLAI
Title
PraisonAI Affected by Remote Code Execution via YAML Deserialization in Agent Definition Loading
Summary
PraisonAI is a multi-agent teams system. Prior to 4.5.115, the AgentService.loadAgentFromFile method uses the js-yaml library to parse YAML files without disabling dangerous tags (such as !!js/function and !!js/undefined). This allows an attacker to craft a malicious YAML file that, when parsed, executes arbitrary JavaScript code. An attacker can exploit this vulnerability by uploading a malicious agent definition file via the API endpoint, leading to remote code execution (RCE) on the server. This vulnerability is fixed in 4.5.115.
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: poc Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
MervinPraison PraisonAI Affected: < 4.5.115
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-39580 (GCVE-0-2026-39580)

Vulnerability from cvelistv5 – Published: 2026-06-16 20:57 – Updated: 2026-06-17 10:39
VLAI
Title
WordPress Micdrop theme <= 1.3.1 - PHP Object Injection vulnerability
Summary
Unauthenticated PHP Object Injection in Micdrop <= 1.3.1 versions.
Severity
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/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
Select-Themes Micdrop Affected: n/a , ≤ 1.3.1 (custom)
Create a notification for this product.
Credits
Denver Jackson | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-39578 (GCVE-0-2026-39578)

Vulnerability from cvelistv5 – Published: 2026-06-16 20:57 – Updated: 2026-06-17 10:39
VLAI
Title
WordPress Valiance theme <= 1.2 - PHP Object Injection vulnerability
Summary
Unauthenticated PHP Object Injection in Valiance <= 1.2 versions.
Severity
8.1 (High)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
Elated-Themes Valiance Affected: n/a , ≤ 1.2 (custom)
Create a notification for this product.
Credits
Denver Jackson | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-39577 (GCVE-0-2026-39577)

Vulnerability from cvelistv5 – Published: 2026-06-16 20:57 – Updated: 2026-06-17 10:39
VLAI
Title
WordPress Playroom theme <= 1.4.1 - PHP Object Injection vulnerability
Summary
Unauthenticated PHP Object Injection in Playroom <= 1.4.1 versions.
Severity
8.1 (High)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
Elated-Themes Playroom Affected: n/a , ≤ 1.4.1 (custom)
Create a notification for this product.
Credits
Denver Jackson | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-39576 (GCVE-0-2026-39576)

Vulnerability from cvelistv5 – Published: 2026-06-17 12:47 – Updated: 2026-06-17 14:25
VLAI
Title
WordPress SingleMalt theme <= 1.5 - PHP Object Injection vulnerability
Summary
Unauthenticated PHP Object Injection in SingleMalt <= 1.5 versions.
Severity
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/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
Elated-Themes SingleMalt Affected: n/a , ≤ 1.5 (custom)
Create a notification for this product.
Credits
Denver Jackson | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-39573 (GCVE-0-2026-39573)

Vulnerability from cvelistv5 – Published: 2026-06-17 09:50 – Updated: 2026-06-17 15:27
VLAI
Title
WordPress Mildhill theme <= 1.5 - PHP Object Injection vulnerability
Summary
Unauthenticated PHP Object Injection in Mildhill <= 1.5 versions.
Severity
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/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
Select-Themes Mildhill Affected: n/a , ≤ 1.5 (custom)
Create a notification for this product.
Credits
Denver Jackson | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-39567 (GCVE-0-2026-39567)

Vulnerability from cvelistv5 – Published: 2026-06-16 20:57 – Updated: 2026-06-17 10:40
VLAI
Title
WordPress Santé theme <= 1.5.1 - PHP Object Injection vulnerability
Summary
Unauthenticated PHP Object Injection in Santé <= 1.5.1 versions.
Severity
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/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
Select-Themes Santé Affected: n/a , ≤ 1.5.1 (custom)
Create a notification for this product.
Credits
Denver Jackson | 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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