EUVD-2026-80746
GHSA-mp2j-5q5c-r5r7
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Network-reachable Jenkins UI with low-complexity trigger; PR:L because the attacker must already hold sandbox-script/Pipeline-author rights; controller-JVM RCE yields full C/I/A; S:U per vendor though S:C is defensible.
Primary rating from Vendor (jenkins).
CVSS VectorVendor: jenkins
Lifecycle Timeline
5DescriptionCVE.org
Jenkins Script Security Plugin 1415.v9a_f9b_3a_c253d and earlier does not check the method called through the proxy created when a sandboxed script coerces a value to an interface, if the value inherits a method of the same name as an interface method, allowing attackers with permission to define and run sandboxed scripts, including Pipelines, to bypass the sandbox protection and execute arbitrary code in the context of the Jenkins controller JVM.
Articles & Coverage 1
AnalysisAI
Sandbox escape in the Jenkins Script Security Plugin 1415.v9a_f9b_3a_c253d and earlier lets an authenticated user who holds permission to define and run sandboxed scripts - including Pipelines - execute arbitrary code in the Jenkins controller JVM, earning a CVSS 3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H). The root cause is a protection-mechanism failure (CWE-693): the sandbox proxy created when a script coerces a value to a Java interface skips the method check when the coerced value inherits a same-named method, so the interface proxy can be used to reach unchecked code. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated principal holding permission to define and run sandboxed scripts, including Jenkins Pipelines (typically Job/Configure or Pipeline-authoring rights) - the CVSS PR:L reflects this. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuine RCE-class sandbox escape but its real-world priority is tempered by a hard authorization prerequisite. … 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 | No exact fixed plugin version is identifiable from the supplied intelligence; the authoritative fix guidance is the Jenkins security advisory at https://www.jenkins.io/security/advisory/2026-09-16/#SECURITY-3929, which should be checked for the patched Script Security Plugin release and then applied through the Jenkins Plugin Manager (or the Update Center / configuration-management tooling), followed by a controller restart as Jenkins requires for plugin updates. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory every Jenkins controller running Script Security Plugin 1415.v9a_f9b_3a_c253d or earlier and audit which accounts hold the permission to define and run sandboxed scripts (typically Job/Configure and In-process Script Approval); immediately reduce that set to the minimum trusted administrators and revoke it from service accounts, contractors, and general developers. …
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Same weakness CWE-693 – Protection Mechanism Failure
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External POC / Exploit Code
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