Missing Authorization in MCP Server - CVE-2026-57300

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Main Vulnerability Database Vulnerabilities #VU135749

Missing Authorization in MCP Server - CVE-2026-57300

Published: June 29, 2026


Vulnerability identifier: #VU135749
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-57300
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Jenkins
Affected software:
MCP Server

Detailed vulnerability description

The vulnerability allows a remote attacker to bypass authorization checks.

The vulnerability exists due to improper authorization checks in the getReplayScripts MCP tool. A remote user can read the Pipeline replay scripts of jobs they can access.


How to mitigate CVE-2026-57300

Install updates from vendor's website.

Sources