{"items":[{"id":"NVI-00012959","kind":"vulnerability","title":"fastify vulnerable to request validation bypass via skipped boolean false schemas","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-hwr6-493r-vm6h","CVE-2026-84469"],"plain_summary":"GitHub lists this reviewed advisory for fastify. 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-0ad04fd58ce59261e439513e2a2c6e63"],"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":"2026-09-30T23:44:59.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-1f5edb727e2983d3f1197c218bb0ce19"},{"kind":"EPSS","as_of":"2026-11-02T12:00:30.000Z","value":"0.492%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.42277. Missing scores are unknown.","source_id":"sr-0ad04fd58ce59261e439513e2a2c6e63"}],"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-1f5edb727e2983d3f1197c218bb0ce19","url":"https://github.com/advisories/GHSA-hwr6-493r-vm6h","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-hwr6-493r-vm6h","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T07:22:52.960Z"},{"id":"sr-0ad04fd58ce59261e439513e2a2c6e63","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-84469","publisher":"FIRST EPSS","observed_at":"2026-11-02T20:17:01.143Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-1f5edb727e2983d3f1197c218bb0ce19"],"technology":"fastify","known_exclusions":[],"conditions_summary":"### Impact\n\nFastify decided whether to validate a request part by checking its schema for JavaScript truthiness. JSON Schema Draft 7 defines the boolean `false` as a valid schema that rejects every instance, but because `false` is falsy, a route that set `body`, `querystring`, `params`, or `headers` to `false` had that part left uncompiled: no validator was attached and the request reached the handler. An application that used `false` as a deny-all schema to make a route unreachable was therefore fully bypassed, and an unauthenticated remote client could reach the handler with any input. The same applied to the documented `query` alias for `querystring`. This is a complete bypass rather than a weak-schema issue, since `false` is the strongest JSON Schema assertion and must always fail.\n\n### Patches\n\nRequest-part schemas are now selected by an explicit presence check rather than truthiness, so a boolean `false` (or `true`) schema is compiled and enforced, including through the `query` alias. Patched in fastify `5.12.2`. The fix is also included in the `6.0.0` release.\n\n### Workarounds\n\nIf upgrading is not immediately possible, express a deny-all request schema with an always-failing","public_affected_ranges":["< 5.12.2"]}],"null_published_at":"2026-11-03T17:49:15.038Z","source_updated_at":"2026-09-30T23:44:59.000Z","source_disclosed_at":"2026-09-30T23:44:58.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-11-01T07:22:52.960Z"},{"id":"NVI-00012959","kind":"vulnerability","title":"fastify vulnerable to request validation bypass via skipped boolean false schemas","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-hwr6-493r-vm6h","CVE-2026-84469"],"plain_summary":"GitHub lists this reviewed advisory for fastify. 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-1f5edb727e2983d3f1197c218bb0ce19"],"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":"2026-09-30T23:44:59.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-1f5edb727e2983d3f1197c218bb0ce19"}],"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-1f5edb727e2983d3f1197c218bb0ce19","url":"https://github.com/advisories/GHSA-hwr6-493r-vm6h","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-hwr6-493r-vm6h","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T07:22:52.960Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-1f5edb727e2983d3f1197c218bb0ce19"],"technology":"fastify","known_exclusions":[],"conditions_summary":"### Impact\n\nFastify decided whether to validate a request part by checking its schema for JavaScript truthiness. JSON Schema Draft 7 defines the boolean `false` as a valid schema that rejects every instance, but because `false` is falsy, a route that set `body`, `querystring`, `params`, or `headers` to `false` had that part left uncompiled: no validator was attached and the request reached the handler. An application that used `false` as a deny-all schema to make a route unreachable was therefore fully bypassed, and an unauthenticated remote client could reach the handler with any input. The same applied to the documented `query` alias for `querystring`. This is a complete bypass rather than a weak-schema issue, since `false` is the strongest JSON Schema assertion and must always fail.\n\n### Patches\n\nRequest-part schemas are now selected by an explicit presence check rather than truthiness, so a boolean `false` (or `true`) schema is compiled and enforced, including through the `query` alias. Patched in fastify `5.12.2`. The fix is also included in the `6.0.0` release.\n\n### Workarounds\n\nIf upgrading is not immediately possible, express a deny-all request schema with an always-failing","public_affected_ranges":["< 5.12.2"]}],"null_published_at":"2026-11-01T07:29:12.905Z","source_updated_at":"2026-09-30T23:44:59.000Z","source_disclosed_at":"2026-09-30T23:44:58.000Z","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":"2026-11-01T07:22:52.960Z"}],"next_cursor":null,"snapshot_revision":"42594"}