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Advisory record · GHSA-284h-m62q-gf8w

GitPython: Dormant multi-line git-config values are corrupted into live injected directives (e.g. core.hooksPath) on any unrelated GitConfigParser write, enabling RCE

CVSS 9.3 CriticalCriticalEPSS 0.0056 · 46th percentile

Critical, because:

  • CVSS score 9.3: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 8 Sept 2026, 18:39 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
gitpythonPyPI<3.1.593.1.59
Identifiers
GHSA-284h-m62q-gf8w · CVE-2026-78676 · PYSEC-2026-3786
Weakness (CWE)
CWE-88 · CWE-94
Tags
Published
8 Sept 2026
Updated
8 Sept 2026

Machine-written summary

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

GitPython versions before 3.1.59 are vulnerable. When a GitConfigParser rewrites a config file, multi-line values that were read from disk are re-serialized unsafely, so a value crafted as a line break followed by a core.hooksPath directive can become a live config key. An attacker who can supply a config file the host application opens read-write (for example through a shipped .git directory or an include) can achieve code execution after an ordinary unrelated config write and a later hook-triggering git operation. Upgrade to GitPython 3.1.59 or later. The source describes no workaround.

Written 5 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

ScoreRatingCVSSVectorSource
9.3 Critical 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CNA (VulnCheck)
  • CISA KEV Not listed.
  • EPSS 0.0056, the 46th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:38 UTC First seen by agentprime
  2. 31 Oct 2026, 14:38 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.