{"id":"GHSA-97r2-qh9m-474h","summary":"Seroval: fromJSON deserializer trusts node-supplied array length and sequence doneAt (unauthenticated event-loop DoS)","details":"### Summary\n\n`fromJSON` and `fromCrossJSON` used two node fields without checking them.\n\n- An array node's element list was not checked to be an array. A small payload could set the length the decoder looped over. This part is also tracked in GHSA-wp97-x4hv-qvhp.\n- A sequence node's done index was not checked. A crafted value produced an iterator that never finished.\n\n### Impact\n\nA service that passes untrusted input to `fromJSON` or `fromCrossJSON` can be made unavailable by an unauthenticated request.\n\n- The array case blocks the thread while the decoder runs.\n- The sequence case makes any code that reads the resulting iterator to the end run forever.\n\n### Patches\n\nFixed in `seroval@1.6.8`.\n\n- Element lists must be arrays.\n- A sequence node's throw and done indices must be integers from -1 up to the last element index.\n\nInvalid input throws `SerovalMalformedNodeError`.\n\n### Workarounds\n\nNone. Upgrade to 1.6.8.","aliases":["CVE-2026-116581"],"modified":"2026-10-28T21:30:06.799577215Z","published":"2026-10-28T21:17:27Z","database_specific":{"github_reviewed_at":"2026-10-28T21:17:27Z","nvd_published_at":"2026-10-26T21:18:15Z","cwe_ids":["CWE-1284","CWE-835"],"severity":"HIGH","github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/lxsmnsyc/seroval/security/advisories/GHSA-97r2-qh9m-474h"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116581"},{"type":"WEB","url":"https://github.com/lxsmnsyc/seroval/commit/cdcee3e3bc384ee844360844f8ea98fd2b275d69"},{"type":"WEB","url":"https://github.com/lxsmnsyc/seroval/commit/e176f9267e59ddd6c9de89cc9fe85c5b37a5b728"},{"type":"PACKAGE","url":"https://github.com/lxsmnsyc/seroval"},{"type":"WEB","url":"https://github.com/lxsmnsyc/seroval/releases/tag/seroval@1.6.8"}],"affected":[{"package":{"name":"seroval","ecosystem":"npm","purl":"pkg:npm/seroval"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.6.8"}]}],"database_specific":{"last_known_affected_version_range":"\u003c= 1.6.7","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-97r2-qh9m-474h/GHSA-97r2-qh9m-474h.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}