{"items":[{"id":"NVI-00011843","kind":"vulnerability","title":"fast-jwt clockTolerance: Infinity silently bypasses both exp and nbf validation (and persists in the verifier cache)","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-687g-22h4-j4w4","CVE-2026-107721"],"plain_summary":"GitHub lists this reviewed advisory for fast-jwt. 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-0147c93b0fb9e792a61cc65c46fd88b0"],"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":"2026-10-08T22:02:03.000Z","value":"5.9 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-422cbd5daf7a8155680933a8c1fc468a"},{"kind":"CVSS","as_of":"2026-10-09T16:17:23.590Z","value":"5.9 MEDIUM (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-460810f08842f5639215741c691446d5"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.341%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.27679. Missing scores are unknown.","source_id":"sr-0147c93b0fb9e792a61cc65c46fd88b0"}],"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-422cbd5daf7a8155680933a8c1fc468a","url":"https://github.com/advisories/GHSA-687g-22h4-j4w4","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-687g-22h4-j4w4","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T00:58:23.763Z"},{"id":"sr-460810f08842f5639215741c691446d5","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-107721","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-107721","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-03T09:58:29.490Z"},{"id":"sr-0147c93b0fb9e792a61cc65c46fd88b0","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-2026-107721","publisher":"FIRST EPSS","observed_at":"2026-11-01T01:39:43.065Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-422cbd5daf7a8155680933a8c1fc468a"],"technology":"fast-jwt","known_exclusions":[],"conditions_summary":"## Summary\n\n`createVerifier({ clockTolerance: Infinity })` silently bypasses both `exp` (expiry) AND `nbf` (not-before) validation. Any expired or not-yet-active token is accepted as valid. The same primitive also corrupts the verifier's internal cache so cached entries inherit infinite validity — they remain valid past a later developer-removed Infinity config until LRU eviction.\n\n## Vulnerable code\n\n`src/verifier.js:531-533` — option validation only rejects negative values, not Infinity:\n\n```js\nif (clockTolerance && (typeof clockTolerance !== 'number' || clockTolerance < 0)) {\n  throw new TokenError(TokenError.codes.invalidOption, 'The clockTolerance option must be a positive number.')\n}\n```\n\n`Infinity` passes (it's a number, not less than 0, truthy).\n\n`src/verifier.js:583-602` — clockTolerance flows into the date-claim validators:\n\n```js\nif (!ignoreNotBefore) {\n  validators.push({ ..., modifier: -clockTolerance })   // → -Infinity\n}\nif (!ignoreExpiration) {\n  validators.push({ ..., modifier: +clockTolerance })   // → Infinity\n}\n```\n\n`src/verifier.js:198-205` — applies modifier additively, producing always-pass comparisons:\n\n```js\nfunction validateClaimDateValue(value, modifier, ","public_affected_ranges":["<= 6.2.4"]}],"null_published_at":"2026-11-04T10:04:35.947Z","source_updated_at":"2026-10-08T22:02:03.000Z","source_disclosed_at":"2026-10-08T22:02:02.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-11-01T00:58:23.763Z"},{"id":"NVI-00011843","kind":"vulnerability","title":"fast-jwt clockTolerance: Infinity silently bypasses both exp and nbf validation (and persists in the verifier cache)","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-687g-22h4-j4w4","CVE-2026-107721"],"plain_summary":"GitHub lists this reviewed advisory for fast-jwt. 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-0147c93b0fb9e792a61cc65c46fd88b0"],"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":"2026-10-08T22:02:03.000Z","value":"5.9 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-422cbd5daf7a8155680933a8c1fc468a"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.341%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.27679. Missing scores are unknown.","source_id":"sr-0147c93b0fb9e792a61cc65c46fd88b0"}],"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-422cbd5daf7a8155680933a8c1fc468a","url":"https://github.com/advisories/GHSA-687g-22h4-j4w4","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-687g-22h4-j4w4","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T00:58:23.763Z"},{"id":"sr-0147c93b0fb9e792a61cc65c46fd88b0","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-2026-107721","publisher":"FIRST EPSS","observed_at":"2026-11-01T01:39:43.065Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-422cbd5daf7a8155680933a8c1fc468a"],"technology":"fast-jwt","known_exclusions":[],"conditions_summary":"## Summary\n\n`createVerifier({ clockTolerance: Infinity })` silently bypasses both `exp` (expiry) AND `nbf` (not-before) validation. Any expired or not-yet-active token is accepted as valid. The same primitive also corrupts the verifier's internal cache so cached entries inherit infinite validity — they remain valid past a later developer-removed Infinity config until LRU eviction.\n\n## Vulnerable code\n\n`src/verifier.js:531-533` — option validation only rejects negative values, not Infinity:\n\n```js\nif (clockTolerance && (typeof clockTolerance !== 'number' || clockTolerance < 0)) {\n  throw new TokenError(TokenError.codes.invalidOption, 'The clockTolerance option must be a positive number.')\n}\n```\n\n`Infinity` passes (it's a number, not less than 0, truthy).\n\n`src/verifier.js:583-602` — clockTolerance flows into the date-claim validators:\n\n```js\nif (!ignoreNotBefore) {\n  validators.push({ ..., modifier: -clockTolerance })   // → -Infinity\n}\nif (!ignoreExpiration) {\n  validators.push({ ..., modifier: +clockTolerance })   // → Infinity\n}\n```\n\n`src/verifier.js:198-205` — applies modifier additively, producing always-pass comparisons:\n\n```js\nfunction validateClaimDateValue(value, modifier, ","public_affected_ranges":["<= 6.2.4"]}],"null_published_at":"2026-11-01T14:34:14.092Z","source_updated_at":"2026-10-08T22:02:03.000Z","source_disclosed_at":"2026-10-08T22:02:02.000Z","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":"2026-11-01T00:58:23.763Z"},{"id":"NVI-00011843","kind":"vulnerability","title":"fast-jwt clockTolerance: Infinity silently bypasses both exp and nbf validation (and persists in the verifier cache)","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-687g-22h4-j4w4","CVE-2026-107721"],"plain_summary":"GitHub lists this reviewed advisory for fast-jwt. 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-422cbd5daf7a8155680933a8c1fc468a"],"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":"2026-10-08T22:02:03.000Z","value":"5.9 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-422cbd5daf7a8155680933a8c1fc468a"}],"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-422cbd5daf7a8155680933a8c1fc468a","url":"https://github.com/advisories/GHSA-687g-22h4-j4w4","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-687g-22h4-j4w4","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T00:58:23.763Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-422cbd5daf7a8155680933a8c1fc468a"],"technology":"fast-jwt","known_exclusions":[],"conditions_summary":"## Summary\n\n`createVerifier({ clockTolerance: Infinity })` silently bypasses both `exp` (expiry) AND `nbf` (not-before) validation. Any expired or not-yet-active token is accepted as valid. The same primitive also corrupts the verifier's internal cache so cached entries inherit infinite validity — they remain valid past a later developer-removed Infinity config until LRU eviction.\n\n## Vulnerable code\n\n`src/verifier.js:531-533` — option validation only rejects negative values, not Infinity:\n\n```js\nif (clockTolerance && (typeof clockTolerance !== 'number' || clockTolerance < 0)) {\n  throw new TokenError(TokenError.codes.invalidOption, 'The clockTolerance option must be a positive number.')\n}\n```\n\n`Infinity` passes (it's a number, not less than 0, truthy).\n\n`src/verifier.js:583-602` — clockTolerance flows into the date-claim validators:\n\n```js\nif (!ignoreNotBefore) {\n  validators.push({ ..., modifier: -clockTolerance })   // → -Infinity\n}\nif (!ignoreExpiration) {\n  validators.push({ ..., modifier: +clockTolerance })   // → Infinity\n}\n```\n\n`src/verifier.js:198-205` — applies modifier additively, producing always-pass comparisons:\n\n```js\nfunction validateClaimDateValue(value, modifier, ","public_affected_ranges":["<= 6.2.4"]}],"null_published_at":"2026-11-01T01:03:56.609Z","source_updated_at":"2026-10-08T22:02:03.000Z","source_disclosed_at":"2026-10-08T22:02:02.000Z","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":"2026-11-01T00:58:23.763Z"}],"next_cursor":null,"snapshot_revision":"42594"}