Path Traversal in Munin-Monitoring Munin
CVE-2026-125357
Munin munin-httpd 2.99.1 through 2.999.18 contains a path traversal vulnerability in the static file handler of Munin::Master::HTML::handle_request that allows unauthenticated attackers to read files outside the static directory. Attackers can request /static/../<file> to bypass the '/../' substring check and read munin.conf and plugin-conf.d files containing monitored service credentials.
Vulnerability class: Path Traversal (Directory Traversal)
Published .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- GitHub Issue #1710 (issue-tracking)
- github.com/munin-monitoring/munin (product)
- github.com/munin-monitoring/munin/blob/2.999.18/lib/Munin/Master/HTML.pm (technical-description)
- github.com/munin-monitoring/munin/commit/e7b6f452ccca04cff8a0e7285c1279b116a768… (patch)
- VulnCheck Advisory: Munin munin-httpd through 2.999.18 Path Traversal via Static File Handler (third-party-advisory)
Frequently asked questions
- What is CVE-2026-125357?
- CVE-2026-125357 is a medium-severity vulnerability in Munin-Monitoring Munin, classified under Path Traversal. CVSS score: 5.3/10. Published 2026-11-09.
- How severe is CVE-2026-125357?
- Medium severity. CVSS v3 base score is 5.3 out of 10.