{"id":"CVE-2026-73621","revision":"7ad5570f9f464b3c95b65c927aadd555","records":[{"revision":"7ad5570f9f464b3c95b65c927aadd555","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-73621","aliases":[],"title":"GitPython before 3.1.56 Arbitrary File Truncation via Commit.count","description":"GitPython before 3.1.56 contains an argument injection vulnerability in the Commit.count() method, which forwards keyword arguments to 'git rev-list' without the check_unsafe_options guard present in the sibling iter_items method. An attacker who can control options passed to Commit.count (e.g., via an application that forwards a user-supplied options dict) can supply output=<path>, causing 'git rev-list --output=<path>' to open and truncate the target file to zero bytes before revision parsing. This allows destruction/blanking of an arbitrary file at the process's privilege level (no content control, 0-byte truncation).","state":0,"publishedAt":"2026-08-13T11:28:22.108+00:00","modifiedAt":"2026-10-08T15:24:41.812+00:00","affected":[{"ecosystem":"Vendor product","name":"GitPython","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"gitpython-developers\",\n                    \"product\": \"GitPython\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:pypi/gitpython\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"3.1.56\"\n                        },\n                        {\n                            \"version\": \"3.1.56\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","score":5.3,"severity":"MEDIUM"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","score":5.4,"severity":"MEDIUM"}],"references":["https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-p538-c434-8v24","https://www.vulncheck.com/advisories/gitpython-before-arbitrary-file-truncation-via-commit-count"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-73621","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-73621","identifiers":["CVE-2026-73621"]},"retained":false,"historicalAffected":[]}],"coverage":[]}