{"id":"CVE-2026-23736","aliases":["GHSA-hj76-42vx-jwp4"],"url":"https://o3.security/vulnerability/CVE-2026-23736","summary":"seroval Affected by Prototype Pollution via JSON Deserialization","details":"seroval facilitates JS value stringification, including complex structures beyond JSON.stringify capabilities. In versions 1.4.0 and below, due to improper input validation, a malicious object key can lead to prototype pollution during JSON deserialization. This vulnerability affects only JSON deserialization functionality. This issue is fixed in version 1.4.1.","published":"2026-01-21T23:01:10.114Z","modified":"2026-09-03T10:10:55.665805434Z","cvss":{"score":7.3,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"},"epss":{"score":0.00261,"percentile":0.18111,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"seroval","fixedVersion":"1.4.1"}],"fix":{"url":"https://github.com/lxsmnsyc/seroval/commit/ce9408ebc87312fcad345a73c172212f2a798060","label":"lxsmnsyc/seroval@ce9408e"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23736.json"},{"type":"ADVISORY","url":"https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-hj76-42vx-jwp4"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23736"},{"type":"FIX","url":"https://github.com/lxsmnsyc/seroval/commit/ce9408ebc87312fcad345a73c172212f2a798060"},{"type":"PACKAGE","url":"https://github.com/lxsmnsyc/seroval"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-03T10:10:55.665805434Z"}}