{"id":"CVE-2026-116580","title":"Seroval: Deserialization invokes attacker-chosen callables: AsyncIteratorFactoryInstance calls source.on(listener) without type check","summary":"Seroval facilitates JavaScript value stringification, including complex structures beyond JSON.stringify capabilities. Prior to 1.6.8, fromJSON rebuilds an AsyncIteratorFactoryInstance by calling source.on(listener) without requiring sou…","severity":"high","cvss":7.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","cvssSource":"cna","cwe":["CWE-502"],"vendor":"lxsmnsyc","product":"seroval","affected":["seroval < 1.6.8"],"published":"2026-10-26","updated":"2026-10-26","sourceUpdated":"2026-10-26T20:35:49.975Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-116580","references":[{"url":"https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-7rv5-mrxv-xcr9","label":"https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-7rv5-mrxv-xcr9"},{"url":"https://github.com/lxsmnsyc/seroval/commit/3edc78b495ea0d6bd498143e5b3e56996607c5f2","label":"https://github.com/lxsmnsyc/seroval/commit/3edc78b495ea0d6bd498143e5b3e56996607c5f2"},{"url":"https://github.com/lxsmnsyc/seroval/commit/50926b3ee198fb757e6ce3aa70efeed38d931c8d","label":"https://github.com/lxsmnsyc/seroval/commit/50926b3ee198fb757e6ce3aa70efeed38d931c8d"},{"url":"https://github.com/lxsmnsyc/seroval/releases/tag/seroval@1.6.8","label":"https://github.com/lxsmnsyc/seroval/releases/tag/seroval@1.6.8"}],"tags":["cve.org"],"ingestedAt":"2026-10-26T20:39:42.520Z","epss":0.00342,"epssPercentile":0.27517,"slug":"CVE-2026-116580","body":"## Overview\n\nSeroval facilitates JavaScript value stringification, including complex structures beyond JSON.stringify capabilities. Prior to 1.6.8, fromJSON rebuilds an AsyncIteratorFactoryInstance by calling source.on(listener) without requiring source to be a genuine internal stream. With untrusted Seroval input and an application plugin that returns a callable value or an object exposing an on method, a crafted node can reuse an identifier so the deserializer invokes the plugin-produced value. This is an incomplete-fix variant of CVE-2026-59940. The resulting confidentiality, integrity, or availability impact depends on the behavior exposed by the application plugin. This issue is fixed in version 1.6.8.\n\n## Affected\n\n- `seroval < 1.6.8`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":40,"depthScoreParts":{"impact":40.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}