munin-monitoring Munin up to 2.999.18 Static File handle_request path traversal

Summaryinfo

A vulnerability classified as problematic was found in munin-monitoring Munin up to 2.999.18. The impacted element is the function Munin::Master::HTML::handle_request of the component Static File Handler. The manipulation results in path traversal. This vulnerability is known as CVE-2026-125357. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability classified as problematic has been found in munin-monitoring Munin up to 2.999.18. Affected is the function Munin::Master::HTML::handle_request of the component Static File Handler. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-125357 since 11/09/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 11/10/2026). The MITRE ATT&CK project declares the attack technique as T1006.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• munin-monitoring

Name

• Munin

Version

• 2.999.0
• 2.999.1
• 2.999.2
• 2.999.3
• 2.999.4
• 2.999.5
• 2.999.6
• 2.999.7
• 2.999.8
• 2.999.9
• 2.999.10
• 2.999.11
• 2.999.12
• 2.999.13
• 2.999.14
• 2.999.15
• 2.999.16
• 2.999.17
• 2.999.18

Website

• Product: https://github.com/munin-monitoring/munin/

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