{"action":"Upgrade devalue to 5.9.3 or later.","affected":[{"fixed":"5.9.3","introduced":"0"}],"component":"devalue","cve_ids":[],"ecosystem":"npm","exploited":false,"fixed_versions":["5.9.3"],"ghsa_id":"GHSA-4q55-j62x-fr9h","id":"tcs_01M5KF150RAYW9RMXSC01Q3K54","modified_at":"2026-10-01T15:30:05.275097480Z","published_at":"2026-10-01T15:13:23Z","references":["https://osv.dev/vulnerability/GHSA-4q55-j62x-fr9h","https://github.com/sveltejs/devalue/security/advisories/GHSA-4q55-j62x-fr9h","https://github.com/sveltejs/devalue/commit/9ec513072e31f45e60d44dad6f0dba9c92bb8675","https://github.com/sveltejs/devalue","https://github.com/sveltejs/devalue/releases/tag/v5.9.3"],"severity":{"label":"medium"},"sources":[{"source":"osv","source_id":"GHSA-4q55-j62x-fr9h","url":"https://osv.dev/vulnerability/GHSA-4q55-j62x-fr9h"}],"summary":"devalue: Malformed null-prototype object keys bypass __proto__ rejection via property-key coercion"}