CVE-2026-110856

Name	CVE-2026-110856
Description	GitPython before 3.2.0 contains a regular expression denial of service vulnerability in the _re_actor_epoch pattern used by parse_actor_and_date on author, committer, and tagger lines. Attackers can serve repositories with commit or tag objects containing long space-filled lines lacking a valid epoch or timezone, causing quadratic backtracking and CPU exhaustion.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-4872-1, DSA-6594-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
python-git (PTS)	bookworm	3.1.30-1+deb12u2	vulnerable
	bookworm (security)	3.1.30-1+deb12u3	fixed
	trixie	3.1.44-1	vulnerable
	trixie (security)	3.1.44-1+deb13u1	fixed
	forky, sid	3.2.1-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin
python-git	source	bookworm	3.1.30-1+deb12u3	DLA-4872-1
python-git	source	trixie	3.1.44-1+deb13u1	DSA-6594-1
python-git	source	(unstable)	3.2.1-1

Notes

https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-m64x-33q8-m5h7
Fixed by: https://github.com/gitpython-developers/GitPython/commit/8290c98d35465a38090cdcc1b17be69967092a15 (3.2.0)