{"id":"PYSEC-2026-3980","details":"GitPython before 3.1.50 fails to validate newline characters in the section parameter of config_writer(), allowing attackers to inject arbitrary section headers into .git/config. Attackers can inject newlines to create a forged [core] section with hooksPath pointing to attacker-controlled directories, achieving remote code execution when git hooks are triggered.","aliases":["CVE-2026-67326","GHSA-mv93-w799-cj2w"],"modified":"2026-09-17T09:00:03.365357969Z","published":"2026-08-01T13:17:03.063Z","references":[{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/gitpython-before-newline-injection-via-config-writer-section"},{"type":"EVIDENCE","url":"https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-mv93-w799-cj2w"}],"affected":[{"package":{"name":"gitpython","ecosystem":"PyPI","purl":"pkg:pypi/gitpython"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.1.50"}]}],"versions":["0.1.7","0.2.0-beta1","0.3.0-beta1","0.3.0-beta2","0.3.1-beta2","0.3.2","0.3.2.1","0.3.2.RC1","0.3.3","0.3.4","0.3.5","0.3.6","0.3.7","1.0.0","1.0.1","1.0.2","2.0.0","2.0.1","2.0.2","2.0.3","2.0.4","2.0.5","2.0.6","2.0.7","2.0.8","2.0.9","2.0.9.dev0","2.0.9.dev1","2.1.0","2.1.1","2.1.10","2.1.11","2.1.12","2.1.13","2.1.14","2.1.15","2.1.2","2.1.3","2.1.4","2.1.5","2.1.6","2.1.7","2.1.8","2.1.9","3.0.0","3.0.1","3.0.2","3.0.3","3.0.4","3.0.5","3.0.6","3.0.7","3.0.8","3.0.9","3.1.0","3.1.1","3.1.10","3.1.11","3.1.12","3.1.13","3.1.14","3.1.15","3.1.16","3.1.17","3.1.18","3.1.19","3.1.2","3.1.20","3.1.22","3.1.23","3.1.24","3.1.25","3.1.26","3.1.27","3.1.28","3.1.29","3.1.3","3.1.30","3.1.31","3.1.32","3.1.33","3.1.34","3.1.35","3.1.36","3.1.37","3.1.38","3.1.4","3.1.40","3.1.41","3.1.42","3.1.43","3.1.44","3.1.45","3.1.46","3.1.47","3.1.48","3.1.49","3.1.5","3.1.6","3.1.7","3.1.8","3.1.9"],"ecosystem_specific":{},"database_specific":{"source":"https://github.com/pypa/advisory-database/blob/main/vulns/gitpython/PYSEC-2026-3980.yaml"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}