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

Quick assessment

Affected
gitpython-developers GitPython
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 GitPython 3.2.0 版本之前， 函数在处理作者、提交者和标签签署者信息时，使用的 正则表达式存在拒绝服务漏洞。攻击者可以构造包含长空格填充行且无效的时间戳或时区信息的 commit 或 tag 对象，从而触发正则表达式的二次回溯，导致 CPU 资源耗尽。

CVSS 7.5 · High

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2026-110856

Vulnerability Information
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Vulnerability Title
GitPython before 3.2.0 ReDoS via _re_actor_epoch in parse_actor_and_date
Source: CVE Program / CVE List V5
Vulnerability 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 Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1333
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
gitpython-developers GitPython 0 ~ 3.2.0 -

II. Public POCs for CVE-2026-110856

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III. Intelligence Information for CVE-2026-110856

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Other References for CVE-2026-110856 (2)

Same Patch Batch · gitpython-developers · 2026-10-14 · 6 CVEs total

CVE-2026-110858 8.1 HIGH GitPython 3.1.30 before 3.2.0 Command Injection via Remote.pull() Refspec
CVE-2026-110859 7.5 HIGH GitPython before 3.2.0 Arbitrary File Read via Head.checkout() Branch Name
CVE-2026-110857 7.5 HIGH GitPython before 3.2.0 Command Execution via ls_remote ext:: URLs
CVE-2026-110855 6.5 MEDIUM GitPython before 3.2.0 Environment Variable Disclosure via .gitmodules Submodule Name
CVE-2026-110860 6.1 MEDIUM GitPython 3.1.62 before 3.2.0 Symlink Path Traversal via Submodule.move()

IV. Related Vulnerabilities

Same product: GitPython
Same vendor: gitpython-developers
Same weakness: CWE-1333

V. Comments for CVE-2026-110856

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