{"items":[{"id":"NVI-00012157","kind":"vulnerability","title":"fast-jwt: Verifier cache accepts expired JWTs without iat.","revision":4,"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-x937-hj6v-793p","CVE-2026-107719"],"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-0a046613fa0f8ab8098434b480a2774d"],"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":"2026-10-08T22:10:36.000Z","value":"4.2 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-b9bbfaa7534b4601c5d30260b09265f7"},{"kind":"CVSS","as_of":"2026-10-09T16:17:23.457Z","value":"4.2 MEDIUM (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-4cc22b5ddecd52d7c9fa10a3e8ebd370"},{"kind":"EPSS","as_of":"2026-11-05T12:03:04.000Z","value":"0.272%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.1963. Missing scores are unknown.","source_id":"sr-0a046613fa0f8ab8098434b480a2774d"}],"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-b9bbfaa7534b4601c5d30260b09265f7","url":"https://github.com/advisories/GHSA-x937-hj6v-793p","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-x937-hj6v-793p","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T00:58:23.763Z"},{"id":"sr-4cc22b5ddecd52d7c9fa10a3e8ebd370","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-107719","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-107719","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-03T09:58:29.490Z"},{"id":"sr-0a046613fa0f8ab8098434b480a2774d","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-2026-107719","publisher":"FIRST EPSS","observed_at":"2026-11-06T00:24:57.627Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-b9bbfaa7534b4601c5d30260b09265f7"],"technology":"fast-jwt","known_exclusions":[],"conditions_summary":"### Summary\n`cacheSet` only derives its `exp` cache deadline inside `hasIat` (`src/verifier.js:127-140`). JWT `iat` is optional. For a valid token with `exp` but no `iat`, `cacheSet` substitutes `clockTimestamp + clockTolerance + cacheTTL` (`src/verifier.js:142-146`). Later, the cache path returns the saved payload before decoding or invoking `verifyToken` (`src/verifier.js:372-388`). Since expiration validation is in `verifyToken`, the expired token remains accepted until the cache deadline.\n\n### Details\nThe bug is an expiration-check bypass caused by caching.\n\nNormally, verification works like this:\n\n  1. Verify signature.\n  2. Check exp against the current time.\n  3. Return the JWT claims.\n\nWith caching enabled, `fast-jwt` saves successful verification results so it can avoid repeating crypto work for the same token.\n\nThe intended invariant is:\n\n  > A cached token must stop being accepted at the same time as a non-cached token.\n\nBut the cache computes its expiration incorrectly.\n\nIn `fast-jwt/src/verifier.js:127`, the code first checks whether the payload has an iat (“issued at”) claim:\n\n```js\nconst hasIat = payload && typeof payload.iat === 'number'\n\nif (hasIat) {\n  if (!ignore","public_affected_ranges":["<= 6.3.3"]}],"null_published_at":"2026-11-08T15:11:49.417Z","source_updated_at":"2026-10-08T22:10:36.000Z","source_disclosed_at":"2026-10-08T22:10:35.000Z","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-00012157","kind":"vulnerability","title":"fast-jwt: Verifier cache accepts expired JWTs without iat.","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-x937-hj6v-793p","CVE-2026-107719"],"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-43d8df8975232684395b893492d6c96f"],"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":"2026-10-08T22:10:36.000Z","value":"4.2 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-b9bbfaa7534b4601c5d30260b09265f7"},{"kind":"CVSS","as_of":"2026-10-09T16:17:23.457Z","value":"4.2 MEDIUM (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-4cc22b5ddecd52d7c9fa10a3e8ebd370"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.272%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.1957. Missing scores are unknown.","source_id":"sr-43d8df8975232684395b893492d6c96f"}],"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-b9bbfaa7534b4601c5d30260b09265f7","url":"https://github.com/advisories/GHSA-x937-hj6v-793p","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-x937-hj6v-793p","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T00:58:23.763Z"},{"id":"sr-4cc22b5ddecd52d7c9fa10a3e8ebd370","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-107719","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-107719","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-03T09:58:29.490Z"},{"id":"sr-43d8df8975232684395b893492d6c96f","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-2026-107719","publisher":"FIRST EPSS","observed_at":"2026-11-01T01:39:43.065Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-b9bbfaa7534b4601c5d30260b09265f7"],"technology":"fast-jwt","known_exclusions":[],"conditions_summary":"### Summary\n`cacheSet` only derives its `exp` cache deadline inside `hasIat` (`src/verifier.js:127-140`). JWT `iat` is optional. For a valid token with `exp` but no `iat`, `cacheSet` substitutes `clockTimestamp + clockTolerance + cacheTTL` (`src/verifier.js:142-146`). Later, the cache path returns the saved payload before decoding or invoking `verifyToken` (`src/verifier.js:372-388`). Since expiration validation is in `verifyToken`, the expired token remains accepted until the cache deadline.\n\n### Details\nThe bug is an expiration-check bypass caused by caching.\n\nNormally, verification works like this:\n\n  1. Verify signature.\n  2. Check exp against the current time.\n  3. Return the JWT claims.\n\nWith caching enabled, `fast-jwt` saves successful verification results so it can avoid repeating crypto work for the same token.\n\nThe intended invariant is:\n\n  > A cached token must stop being accepted at the same time as a non-cached token.\n\nBut the cache computes its expiration incorrectly.\n\nIn `fast-jwt/src/verifier.js:127`, the code first checks whether the payload has an iat (“issued at”) claim:\n\n```js\nconst hasIat = payload && typeof payload.iat === 'number'\n\nif (hasIat) {\n  if (!ignore","public_affected_ranges":["<= 6.3.3"]}],"null_published_at":"2026-11-05T19:10:23.253Z","source_updated_at":"2026-10-08T22:10:36.000Z","source_disclosed_at":"2026-10-08T22:10:35.000Z","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-00012157","kind":"vulnerability","title":"fast-jwt: Verifier cache accepts expired JWTs without iat.","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-x937-hj6v-793p","CVE-2026-107719"],"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-43d8df8975232684395b893492d6c96f"],"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":"2026-10-08T22:10:36.000Z","value":"4.2 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-b9bbfaa7534b4601c5d30260b09265f7"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.272%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.1957. Missing scores are unknown.","source_id":"sr-43d8df8975232684395b893492d6c96f"}],"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-b9bbfaa7534b4601c5d30260b09265f7","url":"https://github.com/advisories/GHSA-x937-hj6v-793p","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-x937-hj6v-793p","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T00:58:23.763Z"},{"id":"sr-43d8df8975232684395b893492d6c96f","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-2026-107719","publisher":"FIRST EPSS","observed_at":"2026-11-01T01:39:43.065Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-b9bbfaa7534b4601c5d30260b09265f7"],"technology":"fast-jwt","known_exclusions":[],"conditions_summary":"### Summary\n`cacheSet` only derives its `exp` cache deadline inside `hasIat` (`src/verifier.js:127-140`). JWT `iat` is optional. For a valid token with `exp` but no `iat`, `cacheSet` substitutes `clockTimestamp + clockTolerance + cacheTTL` (`src/verifier.js:142-146`). Later, the cache path returns the saved payload before decoding or invoking `verifyToken` (`src/verifier.js:372-388`). Since expiration validation is in `verifyToken`, the expired token remains accepted until the cache deadline.\n\n### Details\nThe bug is an expiration-check bypass caused by caching.\n\nNormally, verification works like this:\n\n  1. Verify signature.\n  2. Check exp against the current time.\n  3. Return the JWT claims.\n\nWith caching enabled, `fast-jwt` saves successful verification results so it can avoid repeating crypto work for the same token.\n\nThe intended invariant is:\n\n  > A cached token must stop being accepted at the same time as a non-cached token.\n\nBut the cache computes its expiration incorrectly.\n\nIn `fast-jwt/src/verifier.js:127`, the code first checks whether the payload has an iat (“issued at”) claim:\n\n```js\nconst hasIat = payload && typeof payload.iat === 'number'\n\nif (hasIat) {\n  if (!ignore","public_affected_ranges":["<= 6.3.3"]}],"null_published_at":"2026-11-01T22:58:19.122Z","source_updated_at":"2026-10-08T22:10:36.000Z","source_disclosed_at":"2026-10-08T22:10:35.000Z","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-00012157","kind":"vulnerability","title":"fast-jwt: Verifier cache accepts expired JWTs without iat.","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-x937-hj6v-793p","CVE-2026-107719"],"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-b9bbfaa7534b4601c5d30260b09265f7"],"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":"2026-10-08T22:10:36.000Z","value":"4.2 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-b9bbfaa7534b4601c5d30260b09265f7"}],"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-b9bbfaa7534b4601c5d30260b09265f7","url":"https://github.com/advisories/GHSA-x937-hj6v-793p","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-x937-hj6v-793p","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T00:58:23.763Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-b9bbfaa7534b4601c5d30260b09265f7"],"technology":"fast-jwt","known_exclusions":[],"conditions_summary":"### Summary\n`cacheSet` only derives its `exp` cache deadline inside `hasIat` (`src/verifier.js:127-140`). JWT `iat` is optional. For a valid token with `exp` but no `iat`, `cacheSet` substitutes `clockTimestamp + clockTolerance + cacheTTL` (`src/verifier.js:142-146`). Later, the cache path returns the saved payload before decoding or invoking `verifyToken` (`src/verifier.js:372-388`). Since expiration validation is in `verifyToken`, the expired token remains accepted until the cache deadline.\n\n### Details\nThe bug is an expiration-check bypass caused by caching.\n\nNormally, verification works like this:\n\n  1. Verify signature.\n  2. Check exp against the current time.\n  3. Return the JWT claims.\n\nWith caching enabled, `fast-jwt` saves successful verification results so it can avoid repeating crypto work for the same token.\n\nThe intended invariant is:\n\n  > A cached token must stop being accepted at the same time as a non-cached token.\n\nBut the cache computes its expiration incorrectly.\n\nIn `fast-jwt/src/verifier.js:127`, the code first checks whether the payload has an iat (“issued at”) claim:\n\n```js\nconst hasIat = payload && typeof payload.iat === 'number'\n\nif (hasIat) {\n  if (!ignore","public_affected_ranges":["<= 6.3.3"]}],"null_published_at":"2026-11-01T01:04:01.248Z","source_updated_at":"2026-10-08T22:10:36.000Z","source_disclosed_at":"2026-10-08T22:10:35.000Z","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"}