CVE-2026-57296 — Vulnerability in...

HIGH

Jenkins External Workspace Manager Plugin has a path traversal vulnerability

Published June 24, 2026Updated September 25, 2026Source: osv

Summary

Jenkins External Workspace Manager Plugin 1.3.2 and earlier does not reject `..` path segments when validating the custom workspace path provided to the `exwsAllocate` Pipeline step, allowing the resulting workspace path to escape the configured disk mount point. This allows attackers with Item/Configure permission to read arbitrary files on the Jenkins controller file system, which can lead to remote code execution (see Reading Files). External Workspace Manager Plugin 1.4.0 rejects `..` path segments when validating the custom workspace path, and additionally verifies that the requested path is contained within the configured disk mount point before serving it through the external workspace browse functionality.

Advisory Timeline

First published June 24, 2026 (110 days ago).
Last revised September 25, 2026 — 93 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Maven

Update org.jenkins-ci.plugins:external-workspace-manager to 1.4.0 or later

<!-- Update pom.xml dependency version to 1.4.0 for org.jenkins-ci.plugins:external-workspace-manager -->

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: maven (1).

Package	Ecosystem	Affected	Fixed In
org.jenkins-ci.plugins:external-workspace-manager	maven	1.0-alpha-1, 1.0-beta-1, 1.0.0, 1.1.0 (+9 more)	1.4.0

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CWE-22
Path TraversalMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 8.8 score means for each attack dimension.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Frequently Asked Questions

What is CVE-2026-57296?: Jenkins External Workspace Manager Plugin has a path traversal vulnerability This vulnerability has been assigned a severity rating of HIGH (CVSS score: 8.8/10).
How do I check if my project is affected by CVE-2026-57296?: CVE-2026-57296 affects org.jenkins-ci.plugins:external-workspace-manager. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-57296 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

8.8

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-hrmj-8fm9-cg8x

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