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
1,643 results · Clear filters · Feed
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High 8.1
Site Reviews 7.2.2 - 8.2.2 - Unauthenticated PHP Object Injection via Form Signature
The Site Reviews WordPress plugin before 8.3.0 does not prevent request data from being deserialized, and derives the key protecting that data by padding out the site's WordPress nonce key, which makes the key publicly computable on installs where that key is…
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High 8.1CVE-2026-87930 Public exploit
MaxSite CMS through 109.6 PHP Object Injection via ci_session
MaxSite CMS through 109.6 passes the ci_session cookie to unserialize() without class restrictions, allowing unauthenticated attackers to inject PHP objects. Attackers can forge valid session cookies using the hardcoded encryption key to trigger magic methods…
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High 8.1
Community.general: community.general: memcached cache plugin deserializes untrusted pickle data from memcached, enabling cache-poisoning remote code execution on the ansible controller
A flaw was found in the memcached cache plugin of the community.general Ansible collection. Although its documentation states that records are stored in JSON format, the plugin performs no explicit serialization and relies on python-memcached, which pickles v…
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High 7.5
PocketMine-MP before 5.11.1 Denial of Service via LoginPacket
PocketMine-MP before 5.11.1 contains a denial of service vulnerability in LoginPacket JSON processing that allows remote attackers to crash the server by sending malformed JSON data. Attackers can exploit improper object initialization from scalar JSON types …
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High 8.8
Microsoft Office Publisher Remote Code Execution Vulnerability
Deserialization of untrusted data in Microsoft Office Publisher allows an unauthorized attacker to execute code over a network.
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High 8.8
Microsoft SQL Server Remote Code Execution Vulnerability
Deserialization of untrusted data in SQL Server allows an authorized attacker to execute code over a network.
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High 8.8
Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability
Deserialization of untrusted data in Microsoft Dynamics 365 allows an authorized attacker to execute code over a network.
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High 8.1
Microsoft SQL Server Remote Code Execution Vulnerability
Deserialization of untrusted data in SQL Server allows an unauthorized attacker to execute code over a network.
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High 7.0
Windows IP Address Management (IPAM) Service Elevation of Privilege Vulnerability
Deserialization of untrusted data in Windows IP Address Management (IPAM) Service allows an authorized attacker to elevate privileges locally.
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High 8.8
A Deserialization of Untrusted Data vulnerability in Ivanti Neurons for ITSM before 2026.2 allows a remote authenticate…
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High 8.8
A Deserialization of Untrusted Data vulnerability in Ivanti Neurons for ITSM before 2026.2 allows a remote authenticate…
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High 7.3
Content Extractor Privilege Escalation
Content Extractor contained a deserialization of untrusted data issue affecting privilege management. Software customers upgrade to resolved maintenance release. Update Content Extractor.
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High 8.8
Live Composer <= 2.1.18 - Authenticated (Contributor+) PHP Object Injection via Shortcode
The Live Composer – Free WordPress Website Builder plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 2.1.18 via deserialization of untrusted input . This makes it possible for authenticated attackers, with contri…
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High 7.8
Insecure Deserialization in SAP NetWeaver Business Client
SAP NetWeaver Business Client does not perform sufficient validation when processing certain locally stored data during application startup. An attacker with low privileges on the local system could replace this data with specially crafted content. When the a…
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High 8.8
Artemis-server: artemis-jms-client: artemis-core-client: undertow-core: wildfly-messaging-activemq-subsystem: artemis messaging handlers in red hat eap permit deserialization by default
EAP's Artemis deserialization configuration permits deserialization by default. ObjectMessage.getObject() uses ObjectInputStreamWithClassLoader, which implements allow-list/block-list filtering via its checkSecurity()/isTrustedType() method. However, by defau…
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High 8.8
Welcart e-Commerce <= 2.12.1 - Unauthenticated Arbitrary File Deletion via PHP Object Injection via 'reserve' Checkout Parameter and 'option' EDY Callback
The Welcart e-Commerce plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 2.12.1 via deserialization of untrusted input in the Telecom EDY payment callback (usces_action_acting_transaction). Unauthenticated attack…
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High 7.5
SolidInvoice: PHP unserialize() called on client-controlled data in DataGrid LiveComponent context prop
SolidInvoice is an open-source invoicing platform. Prior to version 3.0.1, the `DataGrid` LiveComponent deserializes a `context` prop value using PHP's `unserialize()` after receiving it from the client. Because the prop is marked `writable: true`, an authent…
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High 8.8
WordPress RTMKit plugin <= 2.1.5 - PHP Object Injection vulnerability
Contributor PHP Object Injection in RTMKit <= 2.1.5 versions.
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High 8.6
Unsafe deserialization in the REST interface
SEPPmail Secure Email Gateway before 15.0.6 deserializes attacker-controlled data in a privileged REST import workflow without adequate validation. An attacker with a privileged API token can execute arbitrary commands with "nobody" privileges.
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High 8.8
Jenkins Performance Plugin 1015.v09ca_52b_3370e and earlier does not restrict the classes that can be instantiated when…
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High 8.8
In Jenkins 2.579 and earlier, LTS 2.568.2 and earlier, transient fields cannot be excluded from deserialization, allowi…
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High 8.8
In Stapler 2107.v8dfcb_e8ed317 and earlier, except 2088.2093.vd7c3e58008a_6, included in Jenkins 2.579 and earlier, LTS…
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High 8.8
WordPress Ninja Forms - Layout & Styles plugin <= 3.0.31 - PHP Object Injection vulnerability
Unauthenticated PHP Object Injection in Ninja Forms - Layout & Styles <= 3.0.31 versions.
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High 8.8
WordPress WP User Frontend plugin <= 4.3.10 - PHP Object Injection vulnerability
Subscriber PHP Object Injection in WP User Frontend <= 4.3.10 versions.
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High 8.8
WP User Frontend < 4.3.11 - Subscriber+ PHP Object Injection via Frontend Post Edit Form
The User Frontend WordPress plugin before 4.3.11 does not prevent user-supplied field values from being deserialized when a submitted post is reopened in its frontend editing form, allowing authenticated users with subscriber-level access and above to perform…
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High 8.8CVE-2026-71981 Public exploit
Cypht < 2.12.2 PHP Object Injection RCE via back_query Parameter
Cypht before 2.12.2 contains a PHP object injection vulnerability that allows authenticated attackers to execute arbitrary operating system commands by supplying a crafted PHP object graph in the back_query GET parameter of the logout handler. Attackers can p…
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High 8.8
Deserialization of Untrusted Data in Elasticsearch Leading to Remote Code Execution
Deserialization of Untrusted Data (CWE-502) in the Elasticsearch machine learning component can lead to remote code execution via Object Injection (CAPEC-586). A specially crafted trained model artifact could cause attacker-controlled logic to execute with a …
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High 8.8
MLFLOW_ALLOW_PICKLE_DESERIALIZATION=False safety control bypassed by mlflow.statsmodels flavor — RCE via crafted model artifact
## Summary MLflow introduced `MLFLOW_ALLOW_PICKLE_DESERIALIZATION` as a security control to prevent unsafe `pickle.load` execution during model loading, in response to CVE-2024-37052 through CVE-2024-37060. When set to `False`, operators expect all pickle des…
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High 7.8
NVIDIA Megatron Bridge contains a vulnerability where an attacker could cause a deserialization of untrusted data. A su…
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High 7.8
NVIDIA Megatron Bridge contains a vulnerability where an attacker could cause a deserialization of untrusted data. A su…
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High 7.8
NVIDIA Megatron Bridge contains a vulnerability where an attacker could cause a deserialization of untrusted data. A su…
-
High 7.8
NVIDIA Megatron Bridge contains a vulnerability where an attacker could cause a deserialization of untrusted data. A su…
-
High 7.8
NVIDIA Megatron Bridge contains a vulnerability where an attacker could cause a deserialization of untrusted data. A su…
-
High 7.8
NVIDIA Megatron Bridge contains a vulnerability where an attacker could cause a deserialization of untrusted data. A su…
-
High 7.8
NVIDIA Megatron Bridge contains a vulnerability where an attacker could cause a deserialization of untrusted data. A su…
-
High 7.8
NVIDIA Megatron Bridge contains a vulnerability where an attacker could cause a deserialization of untrusted data. A su…
-
High 7.8
NVIDIA Megatron Bridge contains a vulnerability where an attacker could cause a deserialization of untrusted data. A su…
-
High 7.8
NVIDIA Megatron Bridge contains a vulnerability where an attacker could cause a deserialization of untrusted data. A su…
-
High 7.8
NVIDIA Megatron Bridge contains a vulnerability where an attacker could cause a deserialization of untrusted data. A su…
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High 7.8
NVIDIA Megatron Bridge contains a vulnerability where an attacker could cause a deserialization of untrusted data. A su…