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CVE-2026-125357VulnerabilityPublished Updated

Munin munin-httpd 2.99.1 through 2.999.18 contains a path traversal vulnerability in the static file handler of

Affects muninSource GCVE Database

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Authoritative record:CVE-2026-125357· Medium 6.9

Not known to be exploited · public detection template (Nuclei) · CVSS 6.9 Medium.

Data as of 12 Nov 2026, 21:48 UTC

CVSS 4.0 base score
6.9Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (VulnCheck)CVSS 4.06.9
CNA (VulnCheck)CVSS 3.15.3
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

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 9 Nov 2026

  2. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  3. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  4. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 12 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Ubuntu 26.10muninpkg:deb/ubuntu/munin?arch=source&distro=stonkingOther threatsAffected
  • =2.0.76-5ubuntu1
Fixed in–
Ubuntu 26.04 LTSmuninpkg:deb/ubuntu/munin?arch=source&distro=resoluteOther threatsAffected
  • =2.0.76-5ubuntu1
Fixed in–
Ubuntu 24.04 LTSmuninpkg:deb/ubuntu/munin?arch=source&distro=nobleOther threatsAffected
  • 2.0.71-2ubuntu1 – 2.0.75-1ubuntu1
4 affected builds
Fixed in–
Ubuntu 22.04 LTSmuninpkg:deb/ubuntu/munin?arch=source&distro=jammyOther threatsAffected
  • =2.0.57-1ubuntu1
  • =2.0.57-1ubuntu2
Fixed in–
Ubuntu 20.04 LTSmuninpkg:deb/ubuntu/munin?arch=source&distro=focalOther threatsAffected
  • 2.0.49-3ubuntu1 – 2.0.56-1ubuntu1
5 affected builds
Fixed in–
Ubuntu 18.04 LTSmuninpkg:deb/ubuntu/munin?arch=source&distro=bionicOther threatsAffected
  • 2.0.33-1 – 2.0.37-1ubuntu0.1
4 affected builds
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Until a fix is available, restrict access to the munin-httpd service and monitor for suspicious requests targeting the static file handler.

Description

Munin munin-httpd versions 2.99.1 through 2.999.18 contain a path traversal vulnerability in the static file handler. This flaw allows unauthenticated attackers to bypass directory restrictions and read sensitive configuration files such as munin.conf and plugin-conf.d, which may contain monitored service credentials. The vulnerability arises from improper handling of '/../' sequences in file path requests.

References

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