Path Traversal in Gitpython-Developers Gitpython
CVE-2026-100689
GitPython before 3.1.62 does not validate the `path` field read from an untrusted .gitmodules file when updating submodules. While a prior fix (GHSA-hmq2-w58f-27jc) added Submodule._validated_name() to constrain the `name` field, and GitPython's own containment guard Submodule._to_relative_path() is applied in add() and move(), Submodule.update() derives the absolute checkout location from the raw `path` value without that guard. A .gitmodules entry containing directory traversal components (e.g., path = ../../../tmp/escaped) can therefore cause directories to be created via os.makedirs() outside the repository working tree, populated from the submodule URL on the clone path, and removed via shutil.rmtree() when force_remove is used. Exploitation requires an application flow that updates submodules at a non-HEAD commit (such as a historical-commit API); the common clone-then-update flow re-derives the path from a canonical tree lookup and is not affected. The issue is fixed in GitPython 3.1.62.
Vulnerability class: Path Traversal (Directory Traversal)
Published .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:L.
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.com/gitpython-developers/GitPython/security/advisories/GHSA-59cr-6r3x-64… (vendor-advisory)
- www.vulncheck.com/advisories/gitpython-before-3.1.62-path-traversal-via-gitmodu… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-100689?
- CVE-2026-100689 is a medium-severity vulnerability in Gitpython-Developers Gitpython, classified under Path Traversal. CVSS score: 5.9/10. Published 2026-09-26.
- How severe is CVE-2026-100689?
- Medium severity. CVSS v3 base score is 5.9 out of 10.