CVE-2026-87818: GitPython 3.1.59 fails to restrict the --no-index option in the high-level diff API, allowing attackers to rea

Routine

MEDIUM 6.5UPGRADE

CVE-2026-87818 is a medium-severity flaw (CVSS 6.5) affecting gitpython. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 65%)
CISA exploited list	No
Weakness	CWE-88
Published	2026-09-09
Last modified	2026-09-16

Publisher (CNA): VulnCheck · Vendor: gitpython project

Last updated 2026-09-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-09 12:17 UTCPublished CVE record published
2026-09-16 15:12 UTCUpdated Record last modified

gitpython project gitpython UPGRADE

Affected: < 3.1.60

Fixed in: 3.1.60

Safe to downgrade to: no unaffected older release

1. Check installed version

pip show gitpython

2. UPGRADE to 3.1.60

pip install --upgrade "gitpython>=3.1.60"

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-87818?

gitpython: upgrade to 3.1.60. Exact commands for each OS are on this page.

Is CVE-2026-87818 being exploited?

CVE-2026-87818 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-87818 affect?

CVE-2026-87818 affects gitpython. Severity is medium (CVSS 6.5). 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

How urgent is CVE-2026-87818?

Priority 37/100. Public exploit reference

Related CVEs

CVE-2026-73625 HIGH 8.8 UPGRADE GitPython versions before 3.1.54 contain a remote code execution vulnerability in the check_unsafe_options gua
CVE-2026-73622 HIGH 7.5 UPGRADE GitPython before 3.1.55 fails to disable environment variable expansion in Remote.create() and Submodule.add()
CVE-2026-73623 HIGH 7.5 UPGRADE GitPython before 3.1.54 contains an incomplete denylist in unsafe_git_clone_options that omits --template, all
CVE-2026-73620 HIGH 8.1 UPGRADE GitPython before 3.1.57 fails to guard git option forwarding in IndexFile.checkout() and TagReference.create()
CVE-2026-73624 HIGH 8.1 UPGRADE GitPython versions before 3.1.54 contain an arbitrary file overwrite vulnerability in the Diffable.diff method

References

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