{"id":"CVE-2026-116582","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-116582","generatedAt":"2026-10-28T05:28:22.010Z","title":"The crafted source can terminate the element and execute script in the page received by another user.","description":"Seroval facilitates JavaScript value stringification, including complex structures beyond JSON.stringify capabilities. Prior to 1.0.0 and from 1.5.5 until 1.6.10, the JavaScript-output APIs serialize a RegExp source containing a less-than character without the escaping needed for an HTML script element. An application is affected when it builds regular expression syntax from untrusted input, serializes that RegExp through serialize, serializeAsync, crossSerialize, crossSerializeAsync, crossSerializeStream, Serializer, or compileJSON, and embeds the result in an HTML script element. The crafted source can terminate the element and execute script in the page received by another user. This issue is fixed in version 1.6.10.","published":"2026-10-26T21:18:16.000Z","lastModified":"2026-10-26T21:18:17.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":4.7,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N"},"cwe":["CWE-79","CWE-116"],"affected":[],"epss":{"score":0.00188,"percentile":0.08295,"date":"2026-10-27","history":[{"date":"2026-10-27","score":0.00188,"percentile":0.08295}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.19%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-26T21:18:16.000Z","detail":{"score":"4.7","severity":"MEDIUM","publishedAt":"2026-10-26T21:18:16.267Z"},"summary":"New CVE, medium severity (CVSS 4.7)."}],"references":[{"url":"https://github.com/lxsmnsyc/seroval/commit/f94ee0b63936dae954ff50d5b5e8ea7cb9b284e6","source":"security-advisories@github.com"},{"url":"https://github.com/lxsmnsyc/seroval/releases/tag/seroval@1.6.10","source":"security-advisories@github.com"},{"url":"https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-9wx9-5pv9-3349","source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-116582","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}