Description
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 O_NOFOLLOW), so the kernel follows the parent symlink and writes attacker bytes anywhere the gogs UID can write — ~git/.ssh/authorized_keys → SSH foothold, or .git/hooks/post-receive → next-push RCE. This vulnerability is fixed in 0.14.3.
Severity (CVSS)
| Base score | 9 |
|---|---|
| Severity | Critical |
| Version | CVSS 4.0 |
| Vector | 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 |
| Provided by | CNA |
Weaknesses
- CWE-22 — CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
- CWE-59 — CWE-59: Improper Link Resolution Before File Access ('Link Following')
- CWE-61 — CWE-61: UNIX Symbolic Link (Symlink) Following
Affected products
| Vendor | Product | Versions |
|---|---|---|
| gogs | gogs | < 0.14.3 |
References
- https://github.com/gogs/gogs/security/advisories/GHSA-89mr-xqfv-758m (x_refsource_CONFIRM)
- https://github.com/gogs/gogs/pull/8332 (x_refsource_MISC)
- https://github.com/gogs/gogs/commit/04cb8afbb01d855454e59977a1cdbf522ea1db31 (x_refsource_MISC)
- https://github.com/gogs/gogs/releases/tag/v0.14.3 (x_refsource_MISC)
Generated from the official CVE List on 25 Jun 2026 10:14 UTC.