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Jenkins EUVD-2026-26222

| CVE-2026-42521 MEDIUM
Deserialization of Untrusted Data (CWE-502)
2026-04-29 jenkins
6.5
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

Lifecycle Timeline

3
CVSS changed
Apr 29, 2026 - 15:22 NVD
6.5 (None) 6.5 (MEDIUM)
EUVD ID Assigned
Apr 29, 2026 - 14:00 euvd
EUVD-2026-26222
CVE Published
Apr 29, 2026 - 13:31 nvd
MEDIUM 6.5

DescriptionCVE.org

Jenkins Matrix Authorization Strategy Plugin 2.0-beta-1 through 3.2.9 (both inclusive) invokes parameterless constructors of classes specified in configuration when deserializing inheritance strategies, without restricting the classes that can be instantiated, allowing attackers with Item/Configure permission to instantiate arbitrary types, which may lead to information disclosure or other impacts depending on the classes available on the classpath.

Analysis

Jenkins Matrix Authorization Strategy Plugin 2.0-beta-1 through 3.2.9 (both inclusive) invokes parameterless constructors of classes specified in configuration when deserializing inheritance strategies, without restricting the classes that can be instantiated, allowing attackers with Item/Configure permission to instantiate arbitrary types, which may lead to information disclosure or other impacts depending on the classes available on the classpath.

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EUVD-2026-26222 vulnerability details – vuln.today

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