EUVD-2026-70113
GHSA-45rc-jrc6-vpjg
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Network-reachable Jenkins UI; Overall/Read is low privilege (PR:L); no interaction needed; full impact consistent with arbitrary type instantiation in configuration subsystem.
Primary rating from Vendor (jenkins).
CVSS VectorVendor: jenkins
Lifecycle Timeline
4DescriptionCVE.org
In Stapler 2107.v8dfcb_e8ed317 and earlier, except 2088.2093.vd7c3e58008a_6, included in Jenkins 2.579 and earlier, LTS 2.568.2 and earlier, Stapler does not restrict the types of objects that can be instantiated via form data binding to those compatible with the expected field type, allowing attackers with Overall/Read permission to instantiate types related to configuration for which that field type was not intended.
Articles & Coverage 2
AnalysisAI
Unsafe type instantiation during form data binding in Jenkins Stapler allows low-privileged authenticated users to trigger instantiation of arbitrary object types unrelated to the intended field type, achieving full compromise (C:H/I:H/A:H) of the Jenkins controller. Affected are Jenkins 2.579 and earlier and LTS 2.568.2 and earlier, via Stapler 2107.v8dfcb_e8ed317 and earlier (excluding the backport 2088.2093.vd7c3e58008a_6). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Attacker must have a valid Jenkins account with at minimum Overall/Read permission - the lowest permission level assignable in Jenkins, typically granted to all authenticated users in most organizational deployments. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.8 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) accurately reflects the attack surface: network-reachable, no complex preconditions, and only Overall/Read permission required. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade Jenkins weekly to version 2.580 or later, or upgrade Jenkins LTS to version 2.568.3 or later; these releases bundle the fixed Stapler version that enforces type-compatible instantiation during form data binding. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Jenkins user accounts with read-level or higher permissions on Jenkins 2.579 and LTS 2.568.2 and earlier, disable unnecessary service accounts, and enable audit logging to detect suspicious form submission patterns. …
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Same weakness CWE-502 – Deserialization of Untrusted Data
View allSame technique Deserialization
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External POC / Exploit Code
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