{"id":"CVE-2026-73621","state":"PUBLISHED","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).","publishedAt":"2026-08-13T11:28:22.108Z","updatedAt":"2026-10-08T15:24:41.812Z","severity":{"score":5.3,"label":"Medium","version":"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","source":"VulnCheck"},"assigner":"VulnCheck","products":["gitpython-developers GitPython"],"affected":[{"vendor":"gitpython-developers","product":"GitPython","packageURL":"pkg:pypi/gitpython","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"3.1.56","versionType":"semver"},{"version":"3.1.56","status":"unaffected","versionType":"semver"}]}],"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"],"weaknesses":["CWE-88"],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/73xxx/CVE-2026-73621.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-73621","state":"PUBLISHED","datePublished":"2026-08-13T11:28:22.108Z","dateUpdated":"2026-10-08T15:24:41.812Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-08-13T11:17:25.160Z"},"containers":{"cna":{"title":"GitPython before 3.1.56 Arbitrary File Truncation via Commit.count","descriptions":[{"lang":"en","value":"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. 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