# CVE-2026-87818

## Summary

- **CVE ID:** CVE-2026-87818
- **Severity:** HIGH
- **CVSS Score:** 7.1 (CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-88
- **Published:** Sep 9, 2026
- **Last Modified:** Sep 9, 2026

## 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 Products

- gitpython-developers — GitPython (3.1.59)
- gitpython-developers — GitPython (3.1.60)

## References

- [CNA](https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-whh4-5q6c-9v3x)
- [CNA](https://www.vulncheck.com/advisories/gitpython-3.1.59-local-file-content-oracle-via-no-index)

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._