Jenkins MCP Server Plugin missing a permission check
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | io.jenkins.plugins:mcp-server | < 0.178.vffe5a | 0.178.vffe5a |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-57300
- https://github.com/jenkinsci/mcp-server-plugin/commit/ffe5ae770f3bd7e88c99aea3018263af0b2f9cc4
- https://github.com/jenkinsci/mcp-server-plugin
- https://github.com/jenkinsci/mcp-server-plugin/releases/tag/0.178.vffe5a_e770f3b_
- https://www.jenkins.io/security/advisory/2026-06-24/#SECURITY-3759
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N- Weakness (CWE)
CWE-862- Platform
- Java / Kotlin (Maven)
- Package
io.jenkins.plugins:mcp-server- Disclosed
- 24.06.2026
- Updated
- 11.10.2026 13:20
Sources and licenses
OSV / GitHub Advisory Database - GHSA-mpff-xhg4-vr45 - CC BY 4.0
Vulnerability history: io.jenkins.plugins:mcp-server
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 10.2025 06.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Medium 2
Disclosures per year
- 2025: 1
- 2026: 1
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Jenkins MCP Server Plugin missing a permission check this entry
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