{"items":[{"id":"NVI-00014131","kind":"vulnerability","title":"Gorilla WebSocket Uses Cryptographically Weak PRNG for WebSocket Mask Key","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-w67g-5rqw-f597"],"plain_summary":"GitHub lists this reviewed advisory for github.com/gorilla/websocket. 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-4e10f6ca2f0c7aed7623372b01400d50"],"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-4e10f6ca2f0c7aed7623372b01400d50","url":"https://github.com/advisories/GHSA-w67g-5rqw-f597","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-w67g-5rqw-f597","publisher":"GitHub Advisory Database","observed_at":"2026-11-02T09:56:46.713Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-4e10f6ca2f0c7aed7623372b01400d50"],"technology":"github.com/gorilla/websocket","known_exclusions":[],"conditions_summary":"gorilla/websocket used `math/rand` (cryptographically weak pseudo-random number generator) to generate WebSocket frame mask keys prior to commit d67f4185. WebSocket masking keys MUST be unpredictable to prevent frame content injection attacks. math/rand produces deterministic output when seeded with a known value, enabling an attacker to predict or recover mask keys and inject content into WebSocket connections.\n\n**Type:** Use of Cryptographically Weak Pseudo-Random Number Generator\n**Fix:** Replaced math/rand with crypto/rand (commit d67f4185, released in v1.5.3)\n**Credit:** bounty-hunter v6.0 silent-fix detection","public_affected_ranges":["< 1.5.3"]}],"null_published_at":"2026-11-02T10:00:37.211Z","source_updated_at":"2026-08-24T21:00:54.000Z","source_disclosed_at":"2026-08-24T21:00:54.000Z","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":"2026-11-02T09:56:46.713Z"}],"next_cursor":null,"snapshot_revision":"42594"}