CVE-2026-59952

Valibot helps validate data using a schema. Versions prior to 1.4.2 can throw a TypeError inside its flatten helper when validation issues contain attacker-controlled object keys such as toString, valueOf, or hasOwnProperty. The issue is reachable through normal record validation. record...

CVE-2026-59952 Valibot: record() issue paths can make flatten() throw for inherited Object property names

Valibot helps validate data using a schema. Versions prior to 1.4.2 can throw a TypeError inside its flatten helper when validation issues contain attacker-controlled object keys such as toString, valueOf, or hasOwnProperty. The issue is reachable through normal record validation. record...

CVE-2026-59952 Valibot: record() issue paths can make flatten() throw for inherited Object property names

Valibot helps validate data using a schema. Versions prior to 1.4.2 can throw a TypeError inside its flatten helper when validation issues contain attacker-controlled object keys such as toString, valueOf, or hasOwnProperty. The issue is reachable through normal record validation. record...

PT-2026-64442

Name of the Vulnerable Software and Affected Versions Valibot versions prior to 1.4.2 Description Valibot can throw a TypeError within its flatten helper when validation issues contain object keys controlled by an attacker that collide with inherited Object.prototype properties, such as toString,...