Low severity3.7NVD Advisory· Published Nov 8, 2026
CVE-2026-123561
CVE-2026-123561
Description
devalue before 5.9.3 allows malformed null-prototype object keys to bypass parse's __proto__ rejection through property-key coercion, an incomplete fix for GHSA-mwv9-gp5h-frr4. Attackers can supply crafted payloads that yield objects with a __proto__ own property, which alone does not cause prototype pollution.
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Affected products
1Patches
Vulnerability mechanics
References
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