CVE-2026-125357 · Other
NO FIX YET · SEE WHAT TO DO
Munin's built-in HTTP server (munin-httpd) checks requests for '/../' in a way that can be bypassed, so an unauthenticated attacker can read files outside the static directory. The sources say this includes munin.conf and plugin-conf.d files that hold monitored service credentials.
first public Nov 10, 2026 · 1 source
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Teams running munin-httpd, Munin's built-in web server for the master HTML interface, on versions 2.99.1 through 2.999.18. Exposure is highest where that web interface is reachable by untrusted users, since no login is required; installations that do not serve the master HTML interface are likely not affected.
Not affected if auth-required, not-exposed-to-network
Who cares monitoring, munin, self-hosted
munin-httpd --version or check the installed Munin package version; affected range is 2.99.1 through 2.999.18.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.
This page as .md · .json · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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