Vulnerability · Published Oct 14, 2026 · Assigned by VulnCheck

CVE-2026-110856GitPython before 3.2.0 ReDoS via _re_actor_epoch in parse_actor_and_date

High 7.5

In plain English

A high-severity regular-expression denial of service in GitPython from gitpython-developers. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.3%top 72.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	python-git	3.1.30-1+deb12u3	DEBIAN-CVE-2026-110856
Debian:13	python-git	3.1.44-1+deb13u1	DEBIAN-CVE-2026-110856
Debian:14	python-git	3.2.1-1	DEBIAN-CVE-2026-110856
PyPI	gitpython	3.2.0	GHSA-m64x-33q8-m5h7
Ubuntu:26.10	python-git	no fix listed	UBUNTU-CVE-2026-110856

Affected products (as reported)

Vendor	Product	Versions
gitpython-developers	GitPython	0 – before 3.2.0

Weakness: CWE-1333 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

GitHub Security Advisory (GHSA-m64x-33q8-m5h7) vendor-advisory
VulnCheck Advisory: GitPython before 3.2.0 ReDoS via _re_actor_epoch in parse_actor_and_date third-party-advisory