GHSA-g5vv-9gxw-82hx: gitpython (CVE-2026-87819)

Package	Ecosystem	Affected	Fixed in
gitpython	PyPI	<3.1.60	3.1.60

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

GitPython versions before 3.1.60 are vulnerable to a regular expression denial of service in the parsing of commit author and committer fields. A crafted commit object containing a very long author or committer string with an unclosed "<" can cause a single GitPython call that reads those fields to consume CPU for minutes. An attacker needs to get such a commit into a repository that the victim's application processes, and the impact is availability only. Upgrade to GitPython 3.1.60 or later.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.7	High	4.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	CNA (VulnCheck)

CISA KEV Not listed.
EPSS 0.0052, the 44th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:09 UTC First seen by agentprime
31 Oct 2026, 14:09 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.