CVE-2026-57300: Jenkins MCP Server Plugin missing a permission check
Jenkins MCP Server Plugin 0.177.v629fdb2557fe and earlier does not perform a permission check in the getReplayScripts MCP tool that returns the replay script of a Pipeline build. This allows attackers with Item/Read permission to obtain the Pipeline script of jobs.
Published Jun 24, 2026 · Updated Sep 25, 2026
Affected packages
io.jenkins.plugins:mcp-server
- Ecosystem
- Maven
- Affected
- < 0.178.vffe5a
- Fixed in
- 0.178.vffe5a
- Check
mvn dependency:tree -Dincludes=io.jenkins.plugins:mcp-server
Advisory details
From the GitHub Advisory Database (CC BY 4.0).
Jenkins MCP Server Plugin 0.177.v629fdb_2557fe and earlier does not perform a permission check in the getReplayScripts MCP tool that returns the replay script of a Pipeline build.
This allows attackers with Item/Read permission to obtain the Pipeline script of jobs.
MCP Server Plugin 0.178.vffe5a_e770f3b_ requires Item/Extended Read permission to return the replay script of a Pipeline build through the getReplayScripts MCP tool.
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-57300
- https://www.jenkins.io/security/advisory/2026-06-24/#SECURITY-3759
- https://github.com/jenkinsci/mcp-server-plugin/commit/ffe5ae770f3bd7e88c99aea3018263af0b2f9cc4
- https://github.com/jenkinsci/mcp-server-plugin/releases/tag/0.178.vffe5a_e770f3b_
- https://github.com/advisories/GHSA-mpff-xhg4-vr45
How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology
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