Soft Serve is a self-hostable Git server for the command line. Prior to version 0.11.2, an authorization bypass in the LFS lock deletion endpoint allows any authenticated user with repository write access to delete locks owned by other users by setting the force flag. The vulnerable code path processes force deletions before retrieving user context, bypassing ownership validation entirely. This issue has been patched in version 0.11.2.

Affected: Go: github.com/charmbracelet/soft-serve

## LFS Lock Force-Delete Authorization Bypass

### Summary

An authorization bypass in the LFS lock deletion endpoint allows any authenticated user with repository write access to delete locks owned by other users by setting the `force` flag. The vulnerable code path processes force deletions before retrieving user context, bypassing ownership validation entirely.

### Severity

- **CWE-863:** Incorrect Authorization - **CVSS 3.1:** 5.4 (Medium) — `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L`

### Affected Code

**File:** `pkg/web/git_lfs.go` **Function:** `serviceLfsLocksDelete` (lines 831–945) **Endpoint:** `POST /<repo>.git/info/lfs/locks/:lockID/unlock`

The control flow processes `req.Force` at line 905 before retrieving user context at line 919:

```go // Line 905-916: Force delete executes immediately without authorization if req.Force { if err := datastore.DeleteLFSLock(ctx, dbx, repo.ID(), lockID); err != nil { // ... } renderJSON(w, http.StatusOK, l) return // Returns here, never reaching user validation }

// Line 919: User context retrieved after force path has exited user := proto.UserFromContext(ctx) ```

### Proof of Concept

**Setup:** Two users with write access to the same repository—User A (lock owner) and User B (attacker).

1. **User A creates a lock:** ```bash curl -X POST http://localhost:23232/repo.git/info/lfs/locks \ -H "Authorization: Basic <user_a_token>" \ -H "Content-Type: application/vnd.git-lfs+json" \…