{"items":[{"id":"NVI-00016403","kind":"vulnerability","title":"Valibot: record() issue paths can make flatten() throw for inherited Object property names","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-5qjj-4xww-7phc","CVE-2026-59952"],"plain_summary":"GitHub lists this reviewed advisory for valibot. 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-19a3b0d9af2d56b674d97be8dec288ae"],"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":"EPSS","as_of":"2026-11-04T12:03:12.000Z","value":"0.383%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.32514. Missing scores are unknown.","source_id":"sr-19a3b0d9af2d56b674d97be8dec288ae"}],"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-6e419877f9626dc489f6725ec2014c9d","url":"https://github.com/advisories/GHSA-5qjj-4xww-7phc","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-5qjj-4xww-7phc","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T09:59:13.529Z"},{"id":"sr-19a3b0d9af2d56b674d97be8dec288ae","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-2026-59952","publisher":"FIRST EPSS","observed_at":"2026-11-04T23:33:33.055Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-6e419877f9626dc489f6725ec2014c9d"],"technology":"valibot","known_exclusions":[],"conditions_summary":"## Summary\n\n`valibot` 1.4.1 can throw a `TypeError` inside its `flatten()` helper when validation issues contain attacker-controlled object keys such as `toString`, `valueOf`, or `hasOwnProperty`.\n\nThe issue is reachable through normal `record()` validation. `record()` intentionally filters `__proto__`, `prototype`, and `constructor`, but it still accepts other own keys that collide with inherited `Object.prototype` properties. If the record key schema or value schema rejects such an entry, Valibot creates an issue path containing that key. Passing the resulting issues to Valibot's documented `flatten()` helper causes `flatErrors.nested[dotPath]` to resolve to the inherited method instead of an own error array, and the helper calls `.push(...)` on that function.\n\nThis is not a global prototype pollution issue. The impact is availability/error handling: applications that validate user-controlled objects with `record()` and flatten validation errors for API responses can crash the request path with a `TypeError` instead of returning structured validation errors.\n\n## Affected package\n\n- Ecosystem: npm\n- Package: `valibot`\n- Affected version verified: `1.4.1`\n- Fixed version: none know","public_affected_ranges":["<= 1.4.1"]}],"null_published_at":"2026-11-08T19:53:38.948Z","source_updated_at":"2026-07-24T16:14:33.000Z","source_disclosed_at":"2026-07-24T16:14:31.000Z","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":"2026-11-03T09:59:13.529Z"},{"id":"NVI-00016403","kind":"vulnerability","title":"Valibot: record() issue paths can make flatten() throw for inherited Object property names","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-5qjj-4xww-7phc","CVE-2026-59952"],"plain_summary":"GitHub lists this reviewed advisory for valibot. 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-6e419877f9626dc489f6725ec2014c9d"],"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-6e419877f9626dc489f6725ec2014c9d","url":"https://github.com/advisories/GHSA-5qjj-4xww-7phc","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-5qjj-4xww-7phc","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T09:59:13.529Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-6e419877f9626dc489f6725ec2014c9d"],"technology":"valibot","known_exclusions":[],"conditions_summary":"## Summary\n\n`valibot` 1.4.1 can throw a `TypeError` inside its `flatten()` helper when validation issues contain attacker-controlled object keys such as `toString`, `valueOf`, or `hasOwnProperty`.\n\nThe issue is reachable through normal `record()` validation. `record()` intentionally filters `__proto__`, `prototype`, and `constructor`, but it still accepts other own keys that collide with inherited `Object.prototype` properties. If the record key schema or value schema rejects such an entry, Valibot creates an issue path containing that key. Passing the resulting issues to Valibot's documented `flatten()` helper causes `flatErrors.nested[dotPath]` to resolve to the inherited method instead of an own error array, and the helper calls `.push(...)` on that function.\n\nThis is not a global prototype pollution issue. The impact is availability/error handling: applications that validate user-controlled objects with `record()` and flatten validation errors for API responses can crash the request path with a `TypeError` instead of returning structured validation errors.\n\n## Affected package\n\n- Ecosystem: npm\n- Package: `valibot`\n- Affected version verified: `1.4.1`\n- Fixed version: none know","public_affected_ranges":["<= 1.4.1"]}],"null_published_at":"2026-11-04T10:04:27.941Z","source_updated_at":"2026-07-24T16:14:33.000Z","source_disclosed_at":"2026-07-24T16:14:31.000Z","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":"2026-11-03T09:59:13.529Z"}],"next_cursor":null,"snapshot_revision":"42594"}