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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.

5346 vulnerabilities reference this CWE, most recent first.

CVE-2026-54806 (GCVE-0-2026-54806)

Vulnerability from cvelistv5 – Published: 2026-06-17 09:51 – Updated: 2026-06-17 15:29
VLAI
Title
WordPress WP Activity Log plugin <= 5.6.3.1 - PHP Object Injection vulnerability
Summary
Unauthenticated PHP Object Injection in WP Activity Log <= 5.6.3.1 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 2026-06-17 13:43 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
Melapress WP Activity Log Affected: n/a , ≤ 5.6.3.1 (custom)
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Credits
daroo | Patchstack Bug Bounty Program
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CVE-2026-54752 (GCVE-0-2026-54752)

Vulnerability from cvelistv5 – Published: 2026-09-17 19:56 – Updated: 2026-09-17 19:56
VLAI
Title
NetBox Device Type Library: Insecure Pickle Deserialization in Test Suite Allows Remote Code Execution via Malicious Pull Request
Summary
NetBox Device Type Library is a collection of community-sourced device type definitions for import into NetBox. The validation test harness can deserialize pull-request-controlled tracked pickle cache files through pickle.load in the read_pickle_data function in tests/pickle_operations.py. An unauthenticated contributor can change USE_LOCAL_KNOWN_SLUGS in tests/test_configuration.py and supply a crafted tests/known-modules.pickle or tests/known-racks.pickle file that tests/definitions_test.py loads when pytest runs. Deserialization invokes attacker-controlled object reduction behavior, allowing arbitrary code execution in the GitHub Actions runner or in a maintainer process that runs the tests, with the confidentiality, integrity, and availability of reachable resources at risk. This vulnerability is fixed with commit 1c6f7e2b93589b965318c6e67ac3504831f0e71e.
Severity
9.6 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CWE
  • CWE-502 - Deserialization of Untrusted Data
  • CWE-829 - Inclusion of Functionality from Untrusted Control Sphere
Assigner
References
Impacted products
Vendor Product Version
netbox-community devicetype-library Affected: < 1c6f7e2b93589b965318c6e67ac3504831f0e71e
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-54512 (GCVE-0-2026-54512)

Vulnerability from cvelistv5 – Published: 2026-06-23 20:56 – Updated: 2026-06-24 15:22
VLAI
Title
jackson-databind: PolymorphicTypeValidator bypass via generic type parameters allows arbitrary class instantiation
Summary
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.10.0 until 2.18.8, 2.21.4, and 3.1.4, jackson-databind's PolymorphicTypeValidator (PTV) is the primary safety mechanism guarding polymorphic deserialization. When polymorphic typing is enabled and a type identifier contains generic parameters (i.e. the type ID string contains <), DatabindContext._resolveAndValidateGeneric() validates only the raw container class name (the substring before <) against the configured PTV. If the container type is approved, the method parses the full canonical type string via TypeFactory.constructFromCanonical() and returns the fully parameterized type without ever validating the nested type arguments against the PTV. The nested type arguments are then resolved, instantiated, and populated as beans during deserialization. An attacker who controls the type ID can therefore place a denied class as a generic type parameter of an allowed container — for example java.util.ArrayList<com.evil.Gadget> when only java.util.ArrayList is allow-listed. The container passes the PTV check; com.evil.Gadget is loaded via Class.forName(name, true, loader), instantiated, and its properties are set from attacker-controlled JSON. This completely bypasses an explicitly configured PTV allow-list. This vulnerability is fixed in 2.18.8, 2.21.4, and 3.1.4.
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: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-24 14:54 UTC
CWE
  • CWE-184 - Incomplete List of Disallowed Inputs
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
FasterXML jackson-databind Affected: >= 2.10.0, < 2.18.8
Affected: >= 2.19.0, < 2.21.4
Affected: >= 3.0.0, < 3.1.4
Create a notification for this product.
Show details on NVD website
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CVE-2026-54499 (GCVE-0-2026-54499)

Vulnerability from cvelistv5 – Published: 2026-07-08 22:23 – Updated: 2026-07-09 13:13
VLAI
Title
Stanza: Remote Code Execution via Unsafe Pickle Deserialization in Model Loaders
Summary
Stanza is a Stanford NLP Python library for tokenization, sentence segmentation, NER, and parsing of many human languages. Prior to 1.12.2, Stanza model loaders such as stanza.models.common.pretrain.Pretrain.load() attempt torch.load(..., weights_only=True) but fall back to torch.load(..., weights_only=False) on attacker-controllable pickle.UnpicklingError, allowing a malicious .pt pretrain or model file to execute arbitrary pickle code when a Stanza NLP pipeline loads it. This issue is fixed in version 1.12.2.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-09 13:13 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
  • CWE-676 - Use of Potentially Dangerous Function
Assigner
References
Impacted products
Vendor Product Version
stanfordnlp stanza Affected: < 1.12.2
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Show details on NVD website
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CVE-2026-54469 (GCVE-0-2026-54469)

Vulnerability from cvelistv5 – Published: 2026-07-10 12:14 – Updated: 2026-07-14 03:55
VLAI
Summary
Dell Unisphere for PowerMax, version(s) 10.3.0.5 and prior, contain(s) a Deserialization of Untrusted Data vulnerability. A low privileged attacker with remote access could potentially exploit this vulnerability, leading to arbitrary command execution with root privileges.
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 2026-07-13 00:00 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
Dell Unisphere for PowerMax Affected: 0 , < 10.3.0.7 or later (semver)
Affected: 0 , < 10.3.1.1 Patch 11360 or later (semver)
Create a notification for this product.
Date Public
2026-07-09 06:30
Show details on NVD website
To clipboard 

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CVE-2026-54194 (GCVE-0-2026-54194)

Vulnerability from cvelistv5 – Published: 2026-06-16 20:56 – Updated: 2026-06-17 10:54
VLAI
Title
WordPress Fusion Builder plugin <= 3.15.4 - PHP Object Injection vulnerability
Summary
Contributor PHP Object Injection in Fusion Builder <= 3.15.4 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 2026-06-17 10:34 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
ThemeFusion Fusion Builder Affected: n/a , ≤ 3.15.4 (custom)
Create a notification for this product.
Credits
daroo | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-54118 (GCVE-0-2026-54118)

Vulnerability from cvelistv5 – Published: 2026-07-14 17:05 – Updated: 2026-09-17 22:29
VLAI
Title
Microsoft SQL Server Remote Code Execution Vulnerability
Summary
Deserialization of untrusted data in SQL Server allows an unauthorized attacker to execute code over a network.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/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 · CISA-ADP (v2.0.3)
Decision recorded 2026-07-15 04:00 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Date Public
2026-07-14 14:00
Show details on NVD website
To clipboard 

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CVE-2026-54117 (GCVE-0-2026-54117)

Vulnerability from cvelistv5 – Published: 2026-07-14 17:05 – Updated: 2026-09-17 22:29
VLAI
Title
Microsoft SQL Server Remote Code Execution Vulnerability
Summary
Deserialization of untrusted data in SQL Server allows an unauthorized attacker to execute code over a network.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/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 · CISA-ADP (v2.0.3)
Decision recorded 2026-07-14 00:00 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Date Public
2026-07-14 14:00
Show details on NVD website
To clipboard 

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CVE-2026-54071 (GCVE-0-2026-54071)

Vulnerability from cvelistv5 – Published: 2026-08-21 18:55 – Updated: 2026-08-21 21:43
VLAI
Title
BabelDOC: Arbitrary Code Execution via CMap Pickle Deserialization in babeldoc/pdfminer/cmapdb.py
Summary
BabelDOC is a document translation tool. Prior to 0.6.3, BabelDOC's vendored PDF parser in babeldoc/pdfminer/cmapdb.py deserializes untrusted pickle data when CMapDB._load_data() loads CMap files. PDF-controlled Encoding or CMapName values and embedded PostScript usecmap operators can reach this sink after path separators are decoded, while _normalize_cmap_name() removes only a leading slash. Absolute paths or traversal sequences can escape the trusted CMap directories through os.path.join(), select an attacker-writable .pickle.gz file, and cause pickle.loads() to execute arbitrary Python code with the privileges of the BabelDOC process. This issue is fixed in version 0.6.3.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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 2026-08-21 21:00 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
funstory-ai BabelDOC Affected: < 0.6.3
Create a notification for this product.
Show details on NVD website
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CVE-2026-53874 (GCVE-0-2026-53874)

Vulnerability from cvelistv5 – Published: 2026-06-17 15:05 – Updated: 2026-06-23 02:00
VLAI
Title
picklescan - Arbitrary Code Execution via Obfuscated eval Call
Summary
picklescan before 1.0.1 contains an unsafe deserialization vulnerability allowing unauthenticated users to execute arbitrary code by hiding eval calls nested under callable objects via getattr. Attackers can embed malicious code in pickle files that evades detection but executes when the pickle is loaded from untrusted sources.
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: poc Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-23 01:59 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
picklescan picklescan Affected: 0 , < 1.0.1 (semver)
Unaffected: 1.0.1 (semver)
    cpe:2.3:a:mmaitre314:picklescan:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-02-02 00:00
Credits
ogrisel
Show details on NVD website
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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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