CVE-2026-67324

GitPython 3.1.50 Authentication Bypass via Joined Short Options

At a glance

Severity: CRITICAL 9.3
EPSS: EPSS 0.64 % · percentile 51 (2026-10-27)
State: PUBLISHED
Published: 2026-08-01
Updated: 2026-10-08
Assigner: VulnCheck
NVD status: Analyzed

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.

Scores

Version	Score	Vector	Scored by
CVSS 4.0	CRITICAL 9.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N	VulnCheck
CVSS 3.1	CRITICAL 9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	VulnCheck
CVSS 4.0	CRITICAL 9.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X	NVD · disclosure@vulncheck.com (Secondary)
CVSS 3.1	CRITICAL 9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	NVD · disclosure@vulncheck.com (Secondary)

Weaknesses (CWE)

CWE-78

Advisories

GHSA-v396-v7q4-x2qj — GitPython unsafe clone option gate bypass through joined short options
PYSEC-2026-3947 — 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-opti

European references

ENISA EUVD · EUVD-2026-51808
GCVE · GCVE-0-2026-67324

Affected configurations (NVD CPE)

cpe:2.3:a:gitpython_project:gitpython:*:*:*:*:*:python:*:* < 3.1.50

Affected products

Product	Versions
gitpython-developers · GitPython	affected 3.1.50 < 3.1.51 ; unaffected 3.1.51

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD