CVE-2026-110859 GitPython before 3.2.0 Arbitrary File Read via Head.checkout() Branch Name
Attackers can read arbitrary files by hosting a repository with a malicious branch name, causing GitPython to leak file contents via error messages.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-110859?
CVE-2026-110859 is a high-severity path traversal vulnerability in gitpython-developers GitPython, published on 14 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
GitPython before 3.2.0 contains an argument injection vulnerability in Head.checkout() that allows remote attackers to read arbitrary files by supplying a branch name parsed as a git option. Attackers can host a repository whose default branch is named --pathspec-from-file=<path>, causing cloning applications that check out the active branch to leak file contents through GitCommandError messages.
Weakness: CWE-88
Which versions are affected by CVE-2026-110859?
2 open source packages ship an affected version, including GitPython and gitpython.
| Package | Affected | Fixed in |
|---|---|---|
GitPython PyPI | All versions | 3.2.0 |
gitpython PyPI | All versions | 3.2.0 |
How do I fix CVE-2026-110859?
Upgrade GitPython to 3.2.0 or later.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-110859 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-110859 exists.
Sources
Also known as DEBIAN-CVE-2026-110859, GHSA-23mf-xhv8-69c2, GHSA-pv89-gqgv-pcc9, MINI-x8v5-mqqj-5q6q, UBUNTU-CVE-2026-110859.