Inefficient regular expression complexity in GitPython - #VU152986
Published: September 30, 2026
Vulnerability identifier: #VU152986
CSH Severity: Medium
CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-1333
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to inefficient regular expression complexity in the _re_actor_epoch regular expression used by parse_actor_and_date when processing malformed author, committer, or tagger lines in commit or tag objects. A remote attacker can supply a crafted commit or tag object to cause a denial of service.
Exploitation requires an application to read the affected actor field from an untrusted repository.
Affected software
GitPython
Remediation
Install security update from vendor's website.
GitPython - update to 3.2.0