CVE-2026-57300: Jenkins MCP Server Plugin missing a permission check

June 24, 2026 (updated September 25, 2026)

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

github.com/advisories/GHSA-mpff-xhg4-vr45
github.com/jenkinsci/mcp-server-plugin/commit/ffe5ae770f3bd7e88c99aea3018263af0b2f9cc4
github.com/jenkinsci/mcp-server-plugin/releases/tag/0.178.vffe5a_e770f3b_
nvd.nist.gov/vuln/detail/CVE-2026-57300
www.jenkins.io/security/advisory/2026-06-24/

Code Behaviors & Features

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