What’s Vulnerable › Vulnerabilities

CVE-2026-76219: GitPython before 3.1.58 Arbitrary File Overwrite via read-tree

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-08-19 · updated 2026-09-03
• Weakness: CWE-88

Description

GitPython versions before 3.1.58 contain an arbitrary file overwrite vulnerability in IndexFile.from_tree, IndexFile.reset, and IndexFile.merge_tree methods that append caller-influenced treeish strings to git read-tree without option validation or argument separation. Attackers can inject the --index-output option to overwrite arbitrary files with a valid git-index blob, destroying existing file content at attacker-controlled writable paths.

Affected products

• gitpython-developers GitPython: before 3.1.58 — fixed in 3.1.58

How to fix

Upgrade to a fixed version: gitpython-developers GitPython 3.1.58. Check the vendor advisory for mitigations.

References

• https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-4gmw-gg2m-w46p
• https://www.vulncheck.com/advisories/gitpython-before-arbitrary-file-overwrite-via-read-tree

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