{"id":"CLEANSTART-2026-UN38263","summary":"Handshake messages, such as KeyUpdate, are always considered as state-advancing, regardless of whether a handshake has been completed or not","details":"Security vulnerability affects the temporal-server package. Handshake messages, such as KeyUpdate, are always considered as state-advancing, regardless of whether a handshake has been completed or not.","modified":"2026-10-06T01:00:19.446020360Z","published":"2026-10-06T00:36:14.379337Z","upstream":["CVE-2026-56862"],"database_specific":{},"references":[{"type":"ADVISORY","url":"https://github.com/cleanstart-dev/cleanstart-security-advisories/tree/main/advisories/2026/CLEANSTART-2026-UN38263.json"},{"type":"WEB","url":"https://osv.dev/vulnerability/CVE-2026-56862"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56862"}],"affected":[{"package":{"name":"temporal-server","ecosystem":"CleanStart"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.31.3-r3"}]}],"database_specific":{"source":"https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-UN38263.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}