Vulnerability · Published Sep 9, 2026 · Assigned by VulnCheck

CVE-2026-87818GitPython 3.1.59 Local File Content Oracle via --no-index

Medium 6.5

In plain English

A medium-severity argument injection 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 0.4% (higher than 36% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.4%top 64.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

GitPython 3.1.59 fails to restrict the --no-index option in the high-level diff API, allowing attackers to read arbitrary filesystem paths as repository operands. Attackers can combine --no-index with -I/--ignore-matching-lines to create a content-dependent Boolean oracle, repeatedly querying local files to recover single-line secrets through distinguishable success or error responses.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	python-git	3.1.30-1+deb12u3	DEBIAN-CVE-2026-87818
Debian:13	python-git	3.1.44-1+deb13u1	DEBIAN-CVE-2026-87818
Debian:14	python-git	3.1.61-1	DEBIAN-CVE-2026-87818
PyPI	gitpython	no fix listed	GHSA-rw58-wc66-99g4
PyPI	gitpython	3.1.60	GHSA-whh4-5q6c-9v3x
PyPI	gitpython	3.1.60	PYSEC-2026-3983

Affected products (as reported)

Vendor	Product	Versions
gitpython-developers	GitPython	3.1.59 – before 3.1.60

Weakness: CWE-88 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References

GitHub Security Advisory (GHSA-whh4-5q6c-9v3x) vendor-advisory
VulnCheck Advisory: GitPython 3.1.59 Local File Content Oracle via --no-index third-party-advisory