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Advisory record · GHSA-hrmj-8fm9-cg8x

Jenkins External Workspace Manager Plugin has a path traversal vulnerability

CVSS 8.8 HighEPSS 0.0083 · 57th percentile

Published by the GitHub Advisory Database at 24 Jun 2026, 15:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
org.jenkins-ci.plugins:external-workspace-managerMaven<1.4.01.4.0
Identifiers
GHSA-hrmj-8fm9-cg8x · CVE-2026-57296
Weakness (CWE)
CWE-22
Tags
Published
24 Jun 2026
Updated
25 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The Jenkins External Workspace Manager Plugin, versions 1.3.2 and earlier, does not reject ".." path segments in the custom workspace path given to the exwsAllocate Pipeline step, so a workspace path can escape the configured disk mount point. An attacker with Item/Configure permission can read arbitrary files on the Jenkins controller, which can lead to remote code execution. Upgrade to version 1.4.0 or later, which rejects ".." segments and checks that paths stay within the mount point.

Written 2 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.8 High 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS 0.0083, the 57th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:16 UTC First seen by agentprime
  2. 31 Oct 2026, 14:16 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.