Weakness (CWE)
CWE-502: Deserialization of Untrusted Data
The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
How to prevent it (7 mitigations)
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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.
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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.
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Implementation
Explicitly define a final object() to prevent deserialization.
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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.
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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.
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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.
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Operation
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].
Source: MITRE CWE-502
56 results · Clear filters · Feed
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Critical 9.8
A remote code execution vulnerability exists in Microsoft SQL Server Reporting Services when it incorrectly handles pag…
KEV Sep 18, 2024 -
Critical 9.8
Vulnerability in the Oracle Coherence product of Oracle Fusion Middleware (component: Caching,CacheStore,Invocation). S…
KEV Nov 3, 2021 -
Critical 9.8
Progress Telerik UI for ASP.NET AJAX through 2019.3.1023 contains a .NET deserialization vulnerability in the RadAsyncU…
KEV Nov 3, 2021 -
Critical 9.8
An issue was discovered in Kentico 12.0.x before 12.0.15, 11.0.x before 11.0.48, 10.0.x before 10.0.52, and 9.x version…
KEV Mar 25, 2022 -
High 8.1
Drupal core - Highly critical - Remote Code Execution
Some field types do not properly sanitize data from non-form sources in Drupal 8.5.x before 8.5.11 and Drupal 8.6.x before 8.6.10. This can lead to arbitrary PHP code execution in some cases. A site is only affected by this if one of the following conditions …
KEV Mar 25, 2022 -
Critical 9.8
Deserialization of Untrusted Data in Jenkins
A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153 and earlier, LTS 2.138.3 and earlier in stapler/core/src/main/java/org/kohsuke/stapler/MetaClass.java that allows attackers to invoke some methods on Java objects by acce…
KEV Feb 10, 2022 -
High 8.1
Laravel Framework RCE Vulnerability
In Laravel Framework through 5.5.40 and 5.6.x through 5.6.29, remote code execution might occur as a result of an unserialize call on a potentially untrusted X-XSRF-TOKEN value. This involves the decrypt method in Illuminate/Encryption/Encrypter.php and Pendi…
KEV Jan 16, 2024 -
High 7.5
A remote code execution vulnerability exists in "Microsoft COM for Windows" when it fails to properly handle serialized…
KEV Aug 5, 2024 -
Critical 9.8
Vulnerability in the Oracle WebLogic Server component of Oracle Fusion Middleware (subcomponent: WLS Core Components). …
KEV Sep 8, 2022 -
Critical 9.8
Deserialization of Untrusted Data in Jenkins
Jenkins versions 2.56 and earlier as well as 2.46.1 LTS and earlier are vulnerable to an unauthenticated remote code execution. An unauthenticated remote code execution vulnerability allowed attackers to transfer a serialized Java `SignedObject` object to the…
KEV Oct 2, 2025 -
Critical 9.8
Deserialization of Untrusted Data in Apache commons collections
Red Hat JBoss A-MQ 6.x; BPM Suite (BPMS) 6.x; BRMS 6.x and 5.x; Data Grid (JDG) 6.x; Data Virtualization (JDV) 6.x and 5.x; Enterprise Application Platform 6.x, 5.x, and 4.3.x; Fuse 6.x; Fuse Service Works (FSW) 6.x; Operations Network (JBoss ON) 3.x; Portal …
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Critical 9.8
In Jboss Application Server as shipped with Red Hat Enterprise Application Platform 5.2, it was found that the doFilter…
KEV Dec 10, 2021 -
High 8.1
REST Plugin in Apache Struts uses an XStreamHandler with an instance of XStream for deserialization without any type filtering
The REST Plugin in Apache Struts 2.1.1 through 2.3.x before 2.3.34 and 2.5.x before 2.5.13 uses an XStreamHandler with an instance of XStream for deserialization without any type filtering, which can lead to Remote Code Execution when deserializing XML payloa…
KEV Nov 3, 2021 -
Critical 9.8
Adobe ColdFusion 2016 Update 3 and earlier, ColdFusion 11 update 11 and earlier, ColdFusion 10 Update 22 and earlier ha…
KEV Feb 24, 2025 -
Critical 9.8
Serialized-object interfaces in certain IBM analytics, business solutions, cognitive, IT infrastructure, and mobile and…
KEV Jan 10, 2022 -
Critical 9.8
The WLS Security component in Oracle WebLogic Server 10.3.6.0, 12.1.2.0, 12.1.3.0, and 12.2.1.0 allows remote attackers…
KEV Nov 3, 2021