---
id: CVE-2026-110856
title: >-
  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
summary: >-
  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 …
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-1333
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T23:17:26.760'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-110856'
references:
  - url: >-
      https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-m64x-33q8-m5h7
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/gitpython-before-3.2.0-redos-via-re-actor-epoch-in-parse-actor-and-date
    label: disclosure@vulncheck.com
  - url: 'https://github.com/gitpython-developers/GitPython/pull/2253'
  - url: >-
      https://github.com/gitpython-developers/GitPython/commit/8290c98d35465a38090cdcc1b17be69967092a15
  - url: 'https://github.com/gitpython-developers/GitPython'
  - url: 'https://github.com/gitpython-developers/GitPython/releases/tag/3.2.0'
tags:
  - nvd
  - cve.org
  - exploit-available
  - osv
  - pip
ingestedAt: '2026-10-15T00:02:07.180Z'
vendor: gitpython-developers
product: GitPython
affected:
  - GitPython < 3.2.0
epss: 0.00337
epssPercentile: 0.26946
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-20T02:25:06.149432Z'
aliases:
  - GHSA-m64x-33q8-m5h7
ecosystem: pip
patched:
  - gitpython 3.2.0
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-110856)

Affected packages:

- `gitpython < 3.2.0`

Patched in:

- `gitpython 3.2.0`

Source: https://osv.dev/vulnerability/GHSA-m64x-33q8-m5h7