Medium
python-git — security advisory
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=, causing 'git rev-list --output=' 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).
- Products
- python-git
- Affected versions
- 0.3.2~RC1-2, 0.3.2~RC1-3, 0.3.2~RC1-3ubuntu0.1~esm1, 0.3.2~RC1-3ubuntu0.1~esm2, 0.3.2~RC1-3ubuntu0.1~esm3, 1.0.1+git137-gc8b8379-1, 1.0.1+git137-gc8b8379-2, 1.0.1+git137-gc8b8379-2.1, 1.0.1+git137-gc8b8379-2.1ubuntu0.1~esm1, 1.0.1+git137-gc8b8379-2.1ubuntu0.1~esm2, 1.0.1+git137-gc8b8379-2.1ubuntu0.1~esm4, 2.1.11-1, 2.1.5-1, 2.1.6-1, 2.1.7-1, 2.1.8-1, 2.1.8-1ubuntu0.1~esm1, 2.1.8-1ubuntu0.1~esm2, 2.1.8-1ubuntu0.1~esm4, 3.0.4-1, 3.0.5-1, 3.0.7-1, 3.0.7-1ubuntu0.1~esm1, 3.0.7-1ubuntu0.1~esm2, 3.0.7-1ubuntu0.1~esm4, 3.1.14-1, 3.1.23-1, 3.1.24-1, 3.1.24-1ubuntu0.1~esm1, 3.1.24-1ubuntu0.1~esm2, 3.1.24-1ubuntu0.1~esm3, 3.1.30-1, 3.1.37-1, 3.1.37-3, 3.1.37-3ubuntu0.1~esm2, 3.1.44-1, 3.1.45-1, 3.1.46-1, 3.1.46-1ubuntu0.1~esm1, 3.1.50-1, 3.1.61-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-73621
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:16 UTC · Revision 1
Source evidence
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=, causing 'git rev-list --output=' 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).
osv:UBUNTU-CVE-2026-73621
python-git
Fixed versions: Not specified
python-git
Fixed versions: Not specified
python-git
Fixed versions: Not specified
python-git
Fixed versions: Not specified
python-git
Fixed versions: Not specified
python-git
Fixed versions: Not specified
python-git
Fixed versions: Not specified
python-git
Fixed versions: Not specified
Complete source record
{
"id": "1ea842c6cbed42fc7c3b51e83ff39cd830f8b94296b84c35e8136604169b20a8",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-73621",
"method": "structured",
"payload": {
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"title": "UBUNTU-CVE-2026-73621",
"summary": "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=, causing 'git rev-list --output=' 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).",
"evidence": "osv:UBUNTU-CVE-2026-73621",
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"aliases": [
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],
"modified": "2026-10-17T13:01:04.042668563Z",
"provider": "osv",
"upstream": [
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],
"references": [
"https://ubuntu.com/security/CVE-2026-73621",
"https://www.cve.org/CVERecord?id=CVE-2026-73621",
"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"
]
},
"related_cves": [
{
"value": "CVE-2026-73621",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 360923,
"published_at": "2026-08-13T12:17:00+00:00"
}