{"items":[{"id":"NVI-00016129","kind":"vulnerability","title":"React Router: Arbitrary Constructor Injection via deserializeErrors() in React Router SSR Hydration","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-337j-9hxr-rhxg","CVE-2026-53666"],"plain_summary":"GitHub lists this reviewed advisory for react-router. 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-071ad097157ddca85cf9b4ce0100c652"],"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":"2026-07-23T19:34:16.000Z","value":"6.1 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-2b1bd09ceaf6336e54add501d6823479"},{"kind":"EPSS","as_of":"2026-11-05T12:03:04.000Z","value":"0.420%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.36547. Missing scores are unknown.","source_id":"sr-071ad097157ddca85cf9b4ce0100c652"}],"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-2b1bd09ceaf6336e54add501d6823479","url":"https://github.com/advisories/GHSA-337j-9hxr-rhxg","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-337j-9hxr-rhxg","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T17:42:43.803Z"},{"id":"sr-071ad097157ddca85cf9b4ce0100c652","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-2026-53666","publisher":"FIRST EPSS","observed_at":"2026-11-06T07:17:46.382Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-2b1bd09ceaf6336e54add501d6823479"],"technology":"react-router","known_exclusions":[],"conditions_summary":"If application code allows attacker supplied input to overwrite certain aspects of errors caught by the SSR process, then it was possible for attacker to trigger unexpected constructor execution on the client which would trigger outbound network traffic.  This is only possible with very specific (and unlikely) application layer code.\n\n> [!NOTE]\n> This does not impact your application if you are using Declarative Mode.  This only impacts Framework Mode and Data Mode applications doing manual SSR/hydration","public_affected_ranges":[">= 6.4.0, < 7.18.0"]}],"null_published_at":"2026-11-08T15:11:49.404Z","source_updated_at":"2026-07-23T19:34:16.000Z","source_disclosed_at":"2026-07-23T19:34:14.000Z","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":"2026-11-03T17:42:43.803Z"},{"id":"NVI-00016129","kind":"vulnerability","title":"React Router: Arbitrary Constructor Injection via deserializeErrors() in React Router SSR Hydration","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-337j-9hxr-rhxg","CVE-2026-53666"],"plain_summary":"GitHub lists this reviewed advisory for react-router. 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-2b1bd09ceaf6336e54add501d6823479"],"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":"2026-07-23T19:34:16.000Z","value":"6.1 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-2b1bd09ceaf6336e54add501d6823479"}],"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-2b1bd09ceaf6336e54add501d6823479","url":"https://github.com/advisories/GHSA-337j-9hxr-rhxg","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-337j-9hxr-rhxg","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T17:42:43.803Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-2b1bd09ceaf6336e54add501d6823479"],"technology":"react-router","known_exclusions":[],"conditions_summary":"If application code allows attacker supplied input to overwrite certain aspects of errors caught by the SSR process, then it was possible for attacker to trigger unexpected constructor execution on the client which would trigger outbound network traffic.  This is only possible with very specific (and unlikely) application layer code.\n\n> [!NOTE]\n> This does not impact your application if you are using Declarative Mode.  This only impacts Framework Mode and Data Mode applications doing manual SSR/hydration","public_affected_ranges":[">= 6.4.0, < 7.18.0"]}],"null_published_at":"2026-11-04T10:04:27.896Z","source_updated_at":"2026-07-23T19:34:16.000Z","source_disclosed_at":"2026-07-23T19:34:14.000Z","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":"2026-11-03T17:42:43.803Z"}],"next_cursor":null,"snapshot_revision":"42594"}