Critical severity · published Aug 1, 2026
CVE-2026-67324
GitPython 3.1.50 Authentication Bypass via Joined Short Options
9.8
CVSS
0.6%
EPSS
No
On KEV
Description
GitPython 3.1.50 fails to recognize joined short-option forms such as -u<value> (the short form of --upload-pack=<value>) when enforcing its default unsafe-option gate. When an application passes attacker-influenced clone options into Repo.clone_from(..., multi_options=..., allow_unsafe_options=False), an attacker can supply -u<helper> to bypass the gate that blocks --upload-pack/-u, causing Git to execute the specified helper command during clone. Fixed in 3.1.51.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 51% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GI
GitPython · gitpython-developers
3.1.50 before 3.1.51 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-67324
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-67324
vendor-advisory
https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-v396-v7q4-x2qj
third-party-advisory
https://www.vulncheck.com/advisories/gitpython-authentication-bypass-via-joined-short-options
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