{"items":[{"id":"NVI-00017610","kind":"vulnerability","title":"File Browser: Authentication Bypass via Proxy Auth Header Forgery","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-xqp3-jq6g-x3qm","CVE-2026-54089"],"plain_summary":"GitHub lists this reviewed advisory for github.com/filebrowser/filebrowser/v2. 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-2dc21276a44789e418830c97c7928c74"],"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":"2026-07-10T19:27:17.000Z","value":"9.1 critical","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-2dc21276a44789e418830c97c7928c74"}],"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-2dc21276a44789e418830c97c7928c74","url":"https://github.com/advisories/GHSA-xqp3-jq6g-x3qm","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-xqp3-jq6g-x3qm","publisher":"GitHub Advisory Database","observed_at":"2026-11-04T23:34:12.429Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-2dc21276a44789e418830c97c7928c74"],"technology":"github.com/filebrowser/filebrowser/v2","known_exclusions":[],"conditions_summary":"## Summary\n\nWhen FileBrowser is configured with proxy authentication (`auth.method=proxy`), any unauthenticated attacker who can reach the server directly can impersonate **any user - including admin** - by sending a single forged HTTP header. No credentials are required. Additionally, specifying a non-existent username causes the server to **automatically create a new user account**, providing an account creation primitive with no authorization.\n\n**This is an already known issue that has been documented in the documentation for several years, but has not been documented as a vulnerability before.**\n\n## Severity\n\n**HIGH** - CVSS 3.1: **8.1** (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N)\n\n## Affected Component\n\n- **File:** `auth/proxy.go`, lines 21-28\n- **CWE:** CWE-287 (Improper Authentication), CWE-290 (Authentication Bypass by Spoofing)\n- **Affected versions:** All versions supporting `auth.method=proxy`\n\n## Prerequisite: Proxy Auth Must Be Enabled\n\nThis vulnerability is **NOT exploitable on default configuration** (`a","public_affected_ranges":[">= 2.0.0-rc.1, <= 2.63.18"]}],"null_published_at":"2026-11-05T19:10:21.426Z","source_updated_at":"2026-07-10T19:27:17.000Z","source_disclosed_at":"2026-07-10T19:27:13.000Z","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":"2026-11-04T23:34:12.429Z"}],"next_cursor":null,"snapshot_revision":"42594"}