{"items":[{"id":"NVI-00017707","kind":"vulnerability","title":"Flask-Security-Too: WebAuthn reauthentication freshness bypass via cross-user assertion","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-f66q-9rf6-8795"],"plain_summary":"GitHub lists this reviewed advisory for Flask-Security-Too. 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-4ce9aabce51802260898878f043e7b6e"],"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":[],"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-4ce9aabce51802260898878f043e7b6e","url":"https://github.com/advisories/GHSA-f66q-9rf6-8795","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-f66q-9rf6-8795","publisher":"GitHub Advisory Database","observed_at":"2026-11-04T23:34:51.634Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-4ce9aabce51802260898878f043e7b6e"],"technology":"Flask-Security-Too","known_exclusions":[],"conditions_summary":"### Summary\n\nFlask-Security-Too 5.8.0 and 5.8.1 mark a session as reauthentication-fresh after processing a WebAuthn assertion whose proven credential belongs to a different user than the currently authenticated session user. The check that `GHSA-97r5-pg8x-p63p` added on the OAuth reauthentication path (`user.email == current_user.email`) is missing on the WebAuthn reauthentication path. An attacker who owns any WebAuthn credential registered to any account on the deployment can satisfy a victim session's freshness gate by submitting their own WebAuthn proof into the victim session.\n\n### Affected versions\n\n`Flask-Security-Too` `>= 5.8.0, <= 5.8.1` (current `main` commit `5c44c76e33a20b67d02115e26d2da4bab18c094e`).\n`GHSA-97r5-pg8x-p63p` (published 2026-05-22) shipped its fix in 5.8.1 only on `oauth_glue.py`; `webauthn.py` was not touched and remains exploitable in 5.8.1.\n\n### Privilege required\n\nAuthenticated attacker on the same Flask-Security deployment, owning at least one WebAuthn credential of any usage (`first` / `secondary` / verify) that is registered to their own account. The attacker also needs the ability to drive HTTP requests against the WebAuthn endpoints inside the vi","public_affected_ranges":[">= 5.8.0, <= 5.8.1"]}],"null_published_at":"2026-11-05T19:10:21.455Z","source_updated_at":"2026-07-07T23:43:14.000Z","source_disclosed_at":"2026-07-07T23:43:12.000Z","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":"2026-11-04T23:34:51.634Z"}],"next_cursor":null,"snapshot_revision":"42594"}