CVE-2026-123012

Dashboard / Vulnerabilities / CVE-2026-123012

CVE-2026-123012

Summary:

Details: In Gogs 0.14.3, the Git Smart HTTP authorization layer in internal/route/repo/http.go allows a push when only read access was intended, a different vulnerability than CVE-2026-52810. This occurs because of a case-sensitivity desync between the authorization classifier and the request dispatcher: the gitHTTPIsPull function compares the Git action verb case-sensitively and defaults to pull (read access) for any unrecognized string, whereas the request dispatcher lowercases the same verb before routing it to the receive-pack handler. Capitalizing a single letter in the URL (e.g. info/Refs instead of info/refs, or git-receive-Pack instead of git-receive-pack) causes the classifier to misidentify a push as a pull, granting only read-level authorization, whereas the dispatcher routes it to the write handler. An authenticated read-only collaborator can exploit this to push to a private repository, creating, updating, or deleting refs.

References: https://github.com/gogs/gogs/blob/3ba8aca90e17e5410b7e8b227c9f29256ac3e875/internal/route/repo/http.go#L415-L418, https://github.com/gogs/gogs/blob/3ba8aca90e17e5410b7e8b227c9f29256ac3e875/internal/route/repo/http.go#L64-L68, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/123xxx/CVE-2026-123012.json, https://github.com/gogs/gogs/security/advisories/GHSA-wmfg-5p4h-5fw3, https://humanoid.sh/blog/gogs-cve-2026-123012/, https://nvd.nist.gov/vuln/detail/CVE-2026-123012, https://github.com/gogs/gogs