{"items":[{"id":"NVI-00016018","kind":"vulnerability","title":"File Browser: Improper Access Control Occurs via Pre-Created Public Share for a Non-existent Path","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-3q2p-72cj-682c","CVE-2026-54096"],"plain_summary":"GitHub lists this reviewed advisory for github.com/filebrowser/filebrowser/v2, github.com/filebrowser/filebrowser. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-06140f151b7cd3b5357237d110130391"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-07-21T14:45:01.000Z","value":"8.4 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-06140f151b7cd3b5357237d110130391"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-06140f151b7cd3b5357237d110130391","url":"https://github.com/advisories/GHSA-3q2p-72cj-682c","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-3q2p-72cj-682c","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T22:34:49.300Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-06140f151b7cd3b5357237d110130391"],"technology":"github.com/filebrowser/filebrowser/v2","known_exclusions":[],"conditions_summary":"### Summary\nThis is similar vulnrability of **`CVE-2026-0035`**, which was fixed in Android `MediaProvider` with **high** severity. In the original Java issue, `MediaStore.createWriteRequest()` accepted attacker-controlled URIs and created a future grant even when the referenced media item did not exist yet. The Android fix added an existence check before creating the request.\n\n`filebrowser/filebrowser` has the analogous issue in Go. `POST /api/share/` accepts an authenticated request for an arbitrary path and stores a public share record without checking whether the target file currently exists. Later, when a file is created at that same path, the previously created public share immediately becomes valid and exposes the new file through `GET /api/public/dl/`.\n\n### Details\nThe vulnerable create path is:\n\n- `http/share.go`\n- `sharePostHandler()`\n- route: `POST /api/share/`\n\n`sharePostHandler()` only checks that the caller is authenticated and has share/download permissions. It then builds a `share.Link` directly from `r.URL.Path` and saves it:\n\n```go\ns = &share.Link{\n    Path:         r.URL.Path,\n    Hash:         str,\n    Expire:       expire,\n    UserID:       d.","public_affected_ranges":["<= 2.63.6"]},{"certainty":"source_listed","source_ids":["sr-06140f151b7cd3b5357237d110130391"],"technology":"github.com/filebrowser/filebrowser","known_exclusions":[],"conditions_summary":"### Summary\nThis is similar vulnrability of **`CVE-2026-0035`**, which was fixed in Android `MediaProvider` with **high** severity. In the original Java issue, `MediaStore.createWriteRequest()` accepted attacker-controlled URIs and created a future grant even when the referenced media item did not exist yet. The Android fix added an existence check before creating the request.\n\n`filebrowser/filebrowser` has the analogous issue in Go. `POST /api/share/` accepts an authenticated request for an arbitrary path and stores a public share record without checking whether the target file currently exists. Later, when a file is created at that same path, the previously created public share immediately becomes valid and exposes the new file through `GET /api/public/dl/`.\n\n### Details\nThe vulnerable create path is:\n\n- `http/share.go`\n- `sharePostHandler()`\n- route: `POST /api/share/`\n\n`sharePostHandler()` only checks that the caller is authenticated and has share/download permissions. It then builds a `share.Link` directly from `r.URL.Path` and saves it:\n\n```go\ns = &share.Link{\n    Path:         r.URL.Path,\n    Hash:         str,\n    Expire:       expire,\n    UserID:       d.","public_affected_ranges":["<= 1.11.0"]}],"null_published_at":"2026-11-04T10:04:27.865Z","source_updated_at":"2026-07-21T14:45:01.000Z","source_disclosed_at":"2026-06-12T21:07:55.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-03T22:34:49.300Z"}],"next_cursor":null,"snapshot_revision":"42594"}