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CVE-2026-44243VulnerabilityPublished Updated

Snakemake: GitPython reference APIs has a path traversal vulnerability that allows arbitrary file write and delete

Affects snakemakeSource GCVE Database

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Authoritative record:CVE-2026-44243· High 7.8

Public exploit available · CVSS 7.8 High : upgrade to 9.20.0 as a priority.

Data as of 1 Nov 2026, 22:58 UTC

CVSS 4.0 base score
7.8High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 36% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 9.20.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 7 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: evidence found.

    CVSS exploit maturity: proof of concept public

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

    Not in CISA KEV and no source reports exploitation

  5. 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), CVSS vector, the Metasploit, Exploit-DB and nuclei-templates index as of 1 Nov 2026.

What to do

Upgrade snakemake to 9.20.0.

Affected software

ProductAffectedFixed in
Homebrewsnakemakepkg:brew/snakemakeOther threatsAffected
  • >=5.5.3 <9.20.0
Fixed in
  • 9.20.0

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

AI-suggested

A fix is available in Snakemake version 9.20.0. Users should upgrade to this version to remediate the vulnerability. The fix involves validating reference paths before any filesystem write, rename, or delete operation to ensure they do not escape the repository boundaries. No other mitigation is required if the application is updated.

Description

A path traversal vulnerability exists in GitPython reference APIs used by Snakemake (CVE-2026-44243) that allows attackers to write, overwrite, move, or delete files outside the repository's .git directory. This occurs due to insufficient validation of reference paths before filesystem write, rename, and delete operations. The flaw affects Snakemake versions from 5.5.3 up to but not including 9.20.0. The vulnerability requires local access and the ability to supply crafted reference paths to the application using GitPython. The impact includes high integrity and availability risks, such as arbitrary file modification and deletion. A fix is available in Snakemake version 9.20.0.

References

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