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EUVD-2026-330407

2026-10-03T02:22:14.621135+00:00

EUVD-2026-330407

fkie_cve-2026-52812

2026-10-03T02:22:14.621177+00:00

Gogs is an open source self-hosted Git service. Prior to 0.14.3, Git LFS storage is content-addressed by OID alone (///) but per-repo authorization lives in the lfs_object table keyed (repo_id, oid). serveUpload skips re-uploading when the OID file already exists on disk and inserts a new (repo_id, oid) row pointing at it without verifying the request body hashes to the OID being claimed. Any user with write access to one repo can bind their repo to an OID owned by a private repo and download the original bytes via their own download endpoint. This vulnerability is fixed in 0.14.3.

GHSA-6p9m-q3jp-47h4 — Gogs: LFS dedupe path leaks private repo content across tenants

2026-10-03T02:22:14.621229+00:00

Affected: Go: gogs.io/gogs

Summary

Git LFS storage is content-addressed by OID alone (`///`) but per-repo authorization lives in the `lfs_object` table keyed `(repo_id, oid)`. `serveUpload` skips re-uploading when the OID file already exists on disk and inserts a new `(repo_id, oid)` row pointing at it **without verifying the request body hashes to the OID being claimed**. Any user with write access to one repo can bind their repo to an OID owned by a private repo and download the original bytes via their own download endpoint.

Details

Dedupe shortcut at `internal/lfsx/storage.go:79-82`:

```go if fi, err := os.Stat(fpath); err == nil { _, _ = io.Copy(io.Discard, rc) return fi.Size(), nil // ← returns success with no hash check } ```

Hash verification at `internal/lfsx/storage.go:106-108` only runs in the *new-file* branch — the dedupe path returns earlier.

`serveUpload` (`internal/route/lfs/basic.go:78-114`) trusts that success and inserts the per-repo binding:

```go _, err := h.store.GetLFSObjectByOID(c.Req.Context(), repo.ID, oid) // per-repo if err == nil { /* already linked, drain & return 200 */ } written, err := s.Upload(oid, c.Req.Request.Body) err = h.store.CreateLFSObject(c.Req.Context(), repo.ID, oid, written, s.Storage()) ```

`CreateLFSObject` is an unconditional `INSERT` on `(repo_id, oid)` with no check that the OID is referenced by the requesting repo's git history.

`serveDownload` at `internal/route/lfs/basic.go:42-72` only cons…

WID-SEC-W-2026-2013 — Gogs: Mehrere Schwachstellen

2026-10-03T02:22:14.621345+00:00

Ein Angreifer kann mehrere Schwachstellen in Gogs ausnutzen, um erweiterte Berechtigungen zu erlangen, beliebigen Code auszuführen – sogar mit erweiterten Berechtigungen, was zur vollständigen Kontrolle über das System führen kann –, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren, Cross-Site-Scripting-Angriffe durchzuführen, Benutzer auf bösartige Websites umzuleiten oder einen Denial-of-Service-Zustand zu verursachen.