External Workspace Manager Plugin up to 1.3.2 on Jenkins Controller File System path traversal

Summaryinfo

A vulnerability identified as critical has been detected in External Workspace Manager Plugin up to 1.3.2 on Jenkins. This affects an unknown function of the component Controller File System Handler. This manipulation causes path traversal. The identification of this vulnerability is CVE-2026-57296. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as critical was found in External Workspace Manager Plugin up to 1.3.2 on Jenkins. Affected by this vulnerability is some unknown functionality of the component Controller File System Handler. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Jenkins External Workspace Manager Plugin 1.3.2 and earlier does not reject path traversal sequences in the custom workspace path provided to the exwsAllocate Pipeline step, allowing attackers with Item/Configure permission to read arbitrary files on the Jenkins controller file system, which can lead to remote code execution.

The advisory is shared at jenkins.io. This vulnerability is known as CVE-2026-57296 since 06/24/2026. The exploitation appears to be easy. The attack can be launched remotely. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/24/2026). MITRE ATT&CK project uses the attack technique T1006 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Jenkins Plugin

Name

• External Workspace Manager Plugin

Version

• 1.3.0
• 1.3.1
• 1.3.2

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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