CVE-2026-52811
- Source
- https://cve.org/CVERecord?id=CVE-2026-52811
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-52811.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-52811
- Aliases
- Published
- 2026-06-24T20:31:38.233Z
- Modified
- 2026-07-15T01:49:04.850215794Z
- Severity
-
- 9.0 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H CVSS Calculator
- Summary
- Gogs: UploadRepoFiles writes outside repo working tree via committed parent sym
- Details
-
Gogs is an open source self-hosted Git service. Prior to 0.14.3, (*Repository).UploadRepoFiles checks for symlinks only on the leaf of the upload target (osx.IsSymlink(targetPath)). The siblings UpdateRepoFile, DeleteRepoFile, and GetDiffPreview use hasSymlinkInPath, which lstats every component — UploadRepoFiles is the lone outlier. An attacker with repo-write access plus a multipart upload whose filename contains a literal backslash (preserved by filepath.Base on Linux, then converted to / by pathx.Clean) redirects the write through a previously-committed directory symlink. iox.CopyFile opens the destination with os.Create (no ONOFOLLOW), so the kernel follows the parent symlink and writes attacker bytes anywhere the gogs UID can write — ~git/.ssh/authorizedkeys → SSH foothold, or <repo>.git/hooks/post-receive → next-push RCE. This vulnerability is fixed in 0.14.3.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-22", "CWE-59", "CWE-61" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52811.json" }- References
-
- https://github.com/gogs/gogs/releases/tag/v0.14.3
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52811.json
- https://github.com/gogs/gogs/security/advisories/GHSA-89mr-xqfv-758m
- https://nvd.nist.gov/vuln/detail/CVE-2026-52811
- https://github.com/gogs/gogs/commit/04cb8afbb01d855454e59977a1cdbf522ea1db31
- https://github.com/gogs/gogs/pull/8332