GitPython before 3.1.52 is vulnerable to environment-variable exfiltration in Repo.clone_from(). The caller-supplied remote URL is passed through Git.polish_url(), which on non-Cygwin platforms calls os.path.expandvars() on the URL before invoking git clone. An attacker who controls the clone URL can embed $NAME or ${NAME} tokens that are expanded to the values of the hosting process's environment variables (e.g., AWS_SECRET_ACCESS_KEY or GITHUB_TOKEN). The resulting URL, now containing the secret, is transmitted over the network to an attacker-controlled host during the clone attempt, disclosing the secret.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-rwj8-pgh3-r573 Exploit, Vendor Advisory
- https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-rwj8-pgh3-r573 Exploit, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 8.7 · gitpython_projectNVD modified 2026-10-23 23:10
Affected (CPE criteria) 1
cpe:2.3:a:gitpython_project:gitpython:*:*:*:*:*:python:*:*
References 3
- https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-rwj8-pgh3-r573 Exploit, Vendor Advisory
- https://www.vulncheck.com/advisories/gitpython-before-environment-variable-exfiltration-via-clone-from Third Party Advisory
- https://github.com/gitpython-developers/GitPython/security/advisories/GHSA-rwj8-pgh3-r573 Exploit, Vendor Advisory