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
412 results · Clear filters · Feed
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Medium 4.3
In Jenkins 2.579 and earlier, LTS 2.568.2 and earlier, user objects can appear as nested field values in other deserial…
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Medium 5.6
jackson-databind omits java.lang.Comparable from DefaultBaseTypeLimitingValidator's unsafe base types
DefaultBaseTypeLimitingValidator is the PolymorphicTypeValidator applied automatically whenever @JsonTypeInfo is used without an explicitly configured custom validator. It denies polymorphic resolution only for a fixed set of "unsafe base types", and its isSa…
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Medium 5.9
Unsafe deserialization of decrypted terms enables node DoS in AshCloak
Deserialization of Untrusted Data vulnerability in ash-project ash_cloak allows an attacker who can influence the bytes of an encrypted column to crash the BEAM node, by triggering unbounded atom creation or a decompression bomb during decryption. AshCloak.Ca…
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Medium 6.6CVE-2026-76547 Public exploit
Profile Builder < 4.0.1 - Admin+ PHP Object Injection via Import/Export
The User Profile Builder WordPress plugin before 4.0.1 does not validate the type of data being deserialized when importing a configuration file, allowing high privilege users such as administrators to conduct PHP Object Injection. The affected feature is a f…
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Medium 6.6
Remote JVM termination: nested-array Java deserialization bypasses allowlist, triggers StackOverflowError, default JavaLangErrorHandler calls System.exit(99)
A single hostile AMQP message can terminate the entire consumer JVM (System.exit(99)), not just the listener thread — full availability loss for every workload co-located in that process. Spring AMQP 4.1.0 Spring AMQP 4.0.0 - 4.0.4 Spring AMQP 3.2.0 - 3.2.12 …
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Medium 5.6
Unsafe Java deserialization in DefaultExecutionContextSerializer without class allowlist
DefaultExecutionContextSerializer, used by default in Spring Batch's JDBC job repository, passes Base64-decoded bytes directly to ObjectInputStream.readObject() without an ObjectInputFilter that restricts types to a trusted class allowlist. Spring Batch 6.0.0…
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Medium 5.6
JobParameterDeserializer bypasses the trusted-type allowlist
Applications that deserialize execution contexts with Jackson2ExecutionContextStringSerializer are vulnerable to a deserialization attack if they use an untrusted data source for the job repository. The JobParameterDeserializer does not properly enforce the t…
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Medium 6.4
Unsafe Java deserialization in SerializingHttpMessageConverter — remote code execution
SerializingHttpMessageConverter deserializes the body of incoming HTTP requests with a raw java.io.ObjectInputStream and no class filtering. Any request with Content-Type application/x-java-serialized-object whose body resolves to a Serializable type is read …
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Medium 6.3
JsonToObjectTransformer resolves the json__TypeId__ message header to an arbitrary class without an allow-list
Spring Integration's JSON to object conversion uses the json__TypeId__ header to choose the deserialization target type, and resolves that header value to a class with ClassUtils.forName and no type/package allow-list. Spring Integration 7.1.0 Spring Integrat…
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Medium 6.6
Turnkey bbPress by WeaverTheme <= 1.7.1 - Authenticated (Administrator+) PHP Object Injection
The Turnkey bbPress by WeaverTheme plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 1.7.1 via deserialization of untrusted input in the wvrbbp_set_to_serialized_values() function (reached through the wvrbbp_save…
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Medium 5.7
IBM WebSphere Application Server Liberty is affected by a denial of service
IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.8 is affected by a denial of service caused by insecure deserialization. A low-privileged, administrative user could exploit this vulnerability to consume system resources when the restConnect…
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Medium 5.4
Apache Airflow: Arbitrary airflow.* class instantiation on the API server via the XCom deserialize endpoint
Apache Airflow's XCom `GET /api/v2/{...}/xcomEntries/{key}?deserialize=true` endpoint passed a string-literal payload through `BaseXCom.deserialize_value` without the `_check_forbidden_xcom_keys` guard, allowing an authenticated API user with XCom write-and-r…
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Medium 6.6
Potential insecure deserialization in JFrog Artifactory
A party with write access to stored session data may affect JFrog Artifactory under specific conditions.
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Medium 6.5
Microsoft Exchange Server Denial of Service Vulnerability
Deserialization of untrusted data in Microsoft Exchange Server allows an authorized attacker to deny service over a network.
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Medium 6.5
Microsoft SharePoint Server Spoofing Vulnerability
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
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Medium 4.6
Deserialization of untrusted data for some Intel(R) Extension for PyTorch before version 2.8.0 within Ring 3: User Appl…
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Medium 5.9
Memory exhaustion via unbounded deserialization of keyset pagination cursors in Ash.Page.Keyset
Uncontrolled Resource Consumption vulnerability in ash-project ash allows an attacker to exhaust the memory of the node via a crafted keyset pagination cursor. Read actions with keyset pagination deserialize the client-supplied page[:after] or page[:before] c…
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Medium 4.1
Clearfy < 2.4.3 - Admin+ PHP Object Injection via Settings Import
The Clearfy Cache WordPress plugin before 2.4.3 does not restrict the classes allowed when unserializing settings-import data, allowing users with administrator access to perform PHP Object Injection attacks, which may lead to remote code execution when a sui…
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Medium 6.6CVE-2026-16062 Scanner template
Event Booking Manager for WooCommerce < 5.3.7 - Contributor+ PHP Object Injection via Event Timeline and FAQ Content
The Event Booking Manager for WooCommerce WordPress plugin before 5.3.7 does not prevent the deserialization of user-controlled input in some of its event content fields, allowing users with Contributor-level access and above to inject PHP objects. No POP cha…
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Medium 4.3
NVIDIA Tranformers4Rec contains a vulnerability where an attacker could cause improper deserialization of untrusted dat…
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Medium 5.3
NVIDIA TensorRT for contains a vulnerability where a user might cause a deserialization of untrusted data. A successful…
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Medium 6.4
NVIDIA TensorRT-LLM for any platform contains a vulnerability in visual gen server, where an attacker could cause an un…
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Medium 6.3
AkariAsai self-rag retrieval_lm index.py Indexer.deserialize_from deserialization
A vulnerability was determined in AkariAsai self-rag up to 1fcdc420e48f50a7d7ab1ece5494221b93252e99. Affected by this issue is the function Indexer.deserialize_from of the file retrieval_lm/src/index.py of the component retrieval_lm. Executing a manipulation …
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Medium 5.3
yashbhalgat HashNeRF-pytorch Checkpoint File run_nerf.py torch.load deserialization
A vulnerability has been found in yashbhalgat HashNeRF-pytorch up to 82885e698295982504eb6a26d060a6b2473e3706. Affected by this issue is the function torch.load of the file run_nerf.py of the component Checkpoint File Handler. The manipulation of the argument…
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Medium 6.3
yzhao062 pyod persistence.py pyod.utils.persistence.load deserialization
A vulnerability was detected in yzhao062 pyod up to 3.6.1. Affected is the function pyod.utils.persistence.load of the file pyod/utils/persistence.py. Performing a manipulation of the argument path results in deserialization. The attack can be initiated remot…
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Medium 5.3
AD-Security AD_Miner Cache analyse_cache.py request_a deserialization
A vulnerability was determined in AD-Security AD_Miner 1.9.0. Affected is the function request_a of the file ad_miner/scripts/analyse_cache.py of the component Cache Handler. This manipulation of the argument sys.argv[1] causes deserialization. The attack can…
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Medium 6.9
WatchGuard Firebox Management Web UI Denial of Service via Unsafe Deserialization
An authenticated administrator can trigger a denial-of-service condition in the Fireware Management Web UI by sending malformed or crafted data to the put_data endpoint, which performs unsafe deserialization of the attacker-supplied input.
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Medium 5.9CVE-2026-58025 Public exploit
Remote Code Execution via Unsafe Deserialization in LogItem Import
Deserialization of untrusted data vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Import/WikiImporter.Php, includes/Import/WikiRevision.Php, includes/Logging/LogEntryBase.Php. This issue affects Me…
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Medium 6.3
c3p0 exposes a deserialization "sink" via JDBC DataSource bean properties
c3p0 is a JDBC Connection pooling library. In versions prior to 0.14.0, c3p0 in combination with other libraries, can compose to a "sink" for deserialization gadgets. The JDBC spec's DataSource.getConnection() and ConnectionPoolDataSource.getPooledConnection(…
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Medium 6.7
JetBrains Kotlin: Unsafe Deserialization in Kotlin Build Cache Enables Code Execution
In JetBrains Kotlin before 2.4.20 code execution was possible via unsafe deserialization in the build cache metadata
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Medium 6.3
MessagePack-CSharp: Typeless deserialization type restrictions do not recurse into arrays or generic arguments
MessagePack for C# is a MessagePack serializer for C#. Prior to 2.5.301 and 3.1.7, MessagePack-CSharp's typeless deserialization includes MessagePackSerializerOptions.ThrowIfDeserializingTypeIsDisallowed(Type) as a safety check for dangerous types. The defaul…
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Medium 6.3
zhilink 智互联(深圳)科技有限公司 ADP Application Developer Platform 应用开发者平台 testConnection Endpoint deserialization
A vulnerability was found in zhilink 智互联(深圳)科技有限公司 ADP Application Developer Platform 应用开发者平台 1.0.0. This affects an unknown part of the component testConnection Endpoint. The manipulation of the argument jdbcUrl results in deserialization. The attack may be …
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Medium 6.5
picklescan - Arbitrary File Creation via logging.FileHandler Deserialization
picklescan before 1.0.1 contains an unsafe pickle deserialization vulnerability allowing unauthenticated attackers to create arbitrary zero-byte files via logging.FileHandler class instantiation. Attackers can exploit this by crafting malicious pickle payload…
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Medium 6.5
WordPress Slimstat Analytics plugin < 5.4.0 - Deserialization of untrusted data vulnerability
Unauthenticated Deserialization of untrusted data in Slimstat Analytics < 5.4.0 versions.
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Medium 6.6
Counter Box <= 2.0.13 - Authenticated (Administrator+) PHP Object Injection via Import
The Counter Box – Add Countdowns, Timers & Dynamic Counters to WordPress plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 2.0.13 via deserialization of untrusted input . This makes it possible for authenticated …
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Medium 6.8
LangGraph Checkpoint: Unsafe JSON deserialization in checkpoint loading
LangGraph SQLite Checkpoint is an implementation of LangGraph CheckpointSaver that uses SQLite DB (both sync and async, via aiosqlite). In versions 4.1.0 and prior, the JsonPlusSerializer can reconstruct Python objects from JSON checkpoint payloads. Under con…
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Medium 5.3
Insecure Deserialization via MITM in Layer 7 Policy Manager
An attacker who intercepts and tampers with traffic between the client application and the API Gateway server could potentially deserialize arbitrary objects. This vulnerability could lead to broken security expectations or remote code execution.
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Medium 5.4
Microsoft SharePoint Server Spoofing Vulnerability
Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
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Medium 6.3
TYPO3 CMS - Insecure Deserialization in Core API
TYPO3's cache frontend (VariableFrontend) and persistent key-value store (Registry) deserialized PHP payloads without integrity validation or class restrictions. An attacker with write access to the underlying storage backend (cache store or sys_registry data…
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Medium 6.6
LearnPress – Backup & Migration Tool <= 4.1.4 - Authenticated (Administrator+) PHP Object Injection via WXR XML File Upload
The LearnPress – Backup & Migration Tool plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 4.1.4 via deserialization of untrusted input . This makes it possible for authenticated attackers, with administrator-lev…