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-2026-82436 (GCVE-0-2026-82436)

Vulnerability from cvelistv5 – Published: 2026-11-09 10:03 – Updated: 2026-11-09 10:13
VLAI
Title
Apache Storm Client: Deserialization of Untrusted Data from the State Store
Summary
Description `DefaultStateSerializer`, used to persist and restore stateful bolt checkpoints, configured Kryo with class registration disabled and an instantiation strategy that constructs objects without invoking their constructors, then deserialized whatever bytes the state store returned. A party able to write to the topology's keyspace in the state store, for example a co-tenant of a shared Redis instance or anyone with network access to it, could therefore place a serialized object graph that executes code inside the worker JVM when the state is restored. This requires the Redis-backed state provider, which is not the default. Write access to a state-store key is a data-plane privilege; code execution in the worker JVM is not, so the two are not equivalent. Mitigation Upgrade to 3.1.0, where the state serializer requires registered classes. Note that this is a behaviour change for existing state: checkpoints written by an affected version may fail to restore, and a migration step may be required. Users who cannot upgrade immediately should restrict network and credential access to the state store to the cluster itself. Credit The ASF -- found using Claude agents to study the security of open-source projects, validated and reported by Apache Storm.
Severity
No CVSS data available.
CWE
  • CWE-502 - Deserialization of untrusted data
Assigner
apache CNA
References
Impacted products
Vendor Product Version
Apache Software Foundation Apache Storm Client Affected: 3.0.0 , < 3.1.0 (semver)
Create a notification for this product.
Credits
The ASF using Claude Agents
Show details on NVD website
To clipboard 

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CVE-2026-82384 (GCVE-0-2026-82384)

Vulnerability from cvelistv5 – Published: 2026-09-28 07:47 – Updated: 2026-09-29 03:55
VLAI
Title
Apache Roller: Unauthenticated deserialization in the XML-RPC endpoint
Summary
Deserialization of Untrusted Data in Apache Roller 6.1.5 allows an unauthenticated remote attacker to cause deserialization of attacker-controlled bytes, because the XML-RPC endpoint accepts vendor extension types that are deserialized during request parsing, before authentication. The servlet is mapped unconditionally, so parsing occurs even when the global XML-RPC feature is set to disabled; no non-default configuration is required for this path. This can lead to remote code execution. Users are recommended to upgrade to Apache Roller 6.1.6 or later, which disables the extension types and rejects requests when the XML-RPC feature is disabled.
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 2026-09-28 00:00 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
apache CNA
References
Impacted products
Credits
n0mi1k
Show details on NVD website
To clipboard 

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CVE-2026-82337 (GCVE-0-2026-82337)

Vulnerability from cvelistv5 – Published: 2026-11-09 09:51 – Updated: 2026-11-09 09:51
VLAI
Title
Apache Airflow: DeadlineAlert fields bypass plugin-registration gate for scheduler-side deserialization
Summary
Apache Airflow rebuilt deadline alert fields through generic deserialization, which imports and instantiates the class named in the serialized Dag, in the scheduler and API server. A Dag author could cause classes within Airflow's deserialization allow list to be constructed in those processes with arguments they control. Deployments whose Dags use deadline alerts are affected. This is an incomplete fix of CVE-2026-45360, which only hardened the `reference` field; deployments that applied that fix remain affected through the `callback` and `interval` fields. Users of apache-airflow are recommended to upgrade to 3.4.0 or later.
Severity
No CVSS data available.
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
apache CNA
References
Impacted products
Vendor Product Version
Apache Software Foundation Apache Airflow Affected: 0 , < 3.4.0 (semver)
Create a notification for this product.
Credits
Claude Security Scans Jarek Potiuk
Show details on NVD website
To clipboard 

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CVE-2026-82259 (GCVE-0-2026-82259)

Vulnerability from cvelistv5 – Published: 2026-08-28 10:49 – Updated: 2026-10-08 15:25
VLAI
Title
SvelteKit 2.49.0 before 2.53.3 Denial of Service via form
Summary
SvelteKit versions from 2.49.0 through 2.53.2 (fixed in 2.53.3) contain a deserialization expansion issue in the experimental form remote function. When an application enables experimental.remoteFunctions and uses the form function to process the files array without validating files.length or individual file sizes, an attacker can submit relatively small inputs that expand into very large file arrays, leading to expensive processing and denial of service.
Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 13:51 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
VulnCheck CNA
References
Impacted products
Vendor Product Version
sveltejs kit Affected: 2.49.0 , < 2.53.3 (semver)
Unaffected: 2.53.3 (semver)
    cpe:2.3:a:svelte:kit:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-02-26 00:00
Credits
elliott-with-the-longest-name-on-github jviide
Show details on NVD website
To clipboard 

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CVE-2026-82226 (GCVE-0-2026-82226)

Vulnerability from cvelistv5 – Published: 2026-08-31 20:30 – Updated: 2026-09-01 13:51
VLAI
Title
WordPress Tickera plugin <= 3.6.0.2 - PHP Object Injection vulnerability
Summary
Unauthenticated PHP Object Injection in Tickera <= 3.6.0.2 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 2026-09-01 13:51 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
Tickera Tickera Affected: n/a , ≤ 3.6.0.2 (custom)
Create a notification for this product.
Credits
Ionut Pipirig | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-82222 (GCVE-0-2026-82222)

Vulnerability from cvelistv5 – Published: 2026-08-28 10:46 – Updated: 2026-08-28 14:50 X_Open Source
VLAI
Title
WordPress GiveWP plugin <= 4.16.7.1 - Remote Code Execution (RCE) vulnerability
Summary
Deserialization of Untrusted Data vulnerability in Liquid Web / StellarWP GiveWP allows Object Injection. This issue affects GiveWP: from n/a through 4.16.7.1.
Severity
10 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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 14:50 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
Liquid Web / StellarWP GiveWP Affected: n/a , ≤ 4.16.7.1 (custom)
Create a notification for this product.
Credits
Udin Chan | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-82093 (GCVE-0-2026-82093)

Vulnerability from cvelistv5 – Published: 2026-09-24 14:29 – Updated: 2026-09-24 14:55
VLAI
Title
DataStage on Cloud Pak for Data has several vulnerabilities
Summary
IBM DataStage on Cloud Pak for Data 5.4.0.0 could allow a remote authenticated attacker to execute arbitrary code due to unsafe deserialization of untrusted data.
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 2026-09-24 14:54 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
ibm CNA
References
URL Tags
https://www.ibm.com/support/pages/node/7288649 vendor-advisorypatch
Impacted products
Vendor Product Version
IBM DataStage on Cloud Pak for Data Affected: 5.4.0.0
    cpe:2.3:a:ibm:datastage_on_cloud_pak_for_data:5.4.0.0:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-81867 (GCVE-0-2026-81867)

Vulnerability from cvelistv5 – Published: 2026-09-28 10:49 – Updated: 2026-09-30 13:15
VLAI
Title
Deserialization of Untrusted Data in Application Integration allows Remote Code Execution
Summary
A Deserialization of Untrusted Data vulnerability in the JavaScript Task in Google Cloud Application Integration versions prior to 2026-06-28 on Google Cloud Platform allows an authenticated user with standard permissions to run arbitrary code on the shared production servers using a specially crafted script bypassing param guards. This vulnerability was patched on 28 June 2026, and no customer action is needed.
Severity
9.4 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/U:Clear
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 13:13 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
Google Cloud Application Integration Affected: 0 , < 2026-06-28 (date)
Create a notification for this product.
Credits
Brahim Nah
Show details on NVD website
To clipboard 

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CVE-2026-81797 (GCVE-0-2026-81797)

Vulnerability from cvelistv5 – Published: 2026-10-10 19:36 – Updated: 2026-10-11 11:47
VLAI
Title
WordPress Buzz Stone | Magazine & Viral Blog WordPress Theme theme <= 1.0.2 - PHP Object Injection vulnerability
Summary
Unauthenticated PHP Object Injection in Buzz Stone | Magazine & Viral Blog WordPress Theme <= 1.0.2 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 2026-10-11 11:46 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Credits
daroo | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-81784 (GCVE-0-2026-81784)

Vulnerability from cvelistv5 – Published: 2026-09-10 14:23 – Updated: 2026-10-06 09:27 X_Open Source
VLAI
Title
WordPress Wise Chat plugin <= 3.4.2 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in Marcin Wise Chat wise-chat allows Object Injection.This issue affects Wise Chat: from n/a through 3.4.2.
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 · CISA-ADP (v2.0.3)
Decision recorded 2026-09-10 20:36 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
Marcin Wise Chat Affected: 0 , ≤ 3.4.2 (custom)
Create a notification for this product.
Date Public
2026-09-08 11:14
Credits
Peng Zhou | 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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