CVE-2026-25641: Property Key Type Confusion Toctou
Property key $KEY is used in a hasOwnProperty() security check and then in a computed property access without first coercing it to a string primitive. A non-primitive $KEY implementing toString() or [Symbol.toPrimitive] can return different values on successive evaluations — an allowed name during the hasOwnProperty check and a dangerous key ('__proto__', 'c
JSgreprules fetch cve-2026-25641-property-key-type-confusion-toctou --engine opengrepDescription
Property key $KEY is used in a hasOwnProperty() security check and then in a computed property access without first coercing it to a string primitive. A non-primitive $KEY implementing toString() or [Symbol.toPrimitive] can return different values on successive evaluations — an allowed name during the hasOwnProperty check and a dangerous key ('__proto__', 'c
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