CVE-2026-123561

CVE-2026-123561CVE-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.

Scoring

CVSS 3.7 ()
VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Last modified2026-11-08
Sourced from NVD. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.