{"id":"CVE-2026-117470","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-117470","generatedAt":"2026-10-28T04:18:31.094Z","title":"An unauthenticated remote attacker who possessed the user's password and one captured valid WebAuthn assertion could replay that assertion with separate login tokens while the stored challenge remained unchanged, bypassing the WebAuthn second factor.","description":"Psono Server CE & EE versions 3.1.0 through 7.2.3 did not consume a stored WebAuthn challenge after assertion verification. An unauthenticated remote attacker who possessed the user's password and one captured valid WebAuthn assertion could replay that assertion with separate login tokens while the stored challenge remained unchanged, bypassing the WebAuthn second factor. The attack required capture of a valid assertion and did not itself disclose plaintext secrets.","published":"2026-10-27T06:17:25.000Z","lastModified":"2026-10-27T15:00:49.000Z","status":"Deferred","sourceIdentifier":"fdf66990-8419-4c8c-8848-ec15d75773b4","cvss":{"version":"3.1","score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N"},"cwe":["CWE-294"],"affected":[],"epss":{"score":0.00408,"percentile":0.34915,"date":"2026-10-27","history":[{"date":"2026-10-27","score":0.00408,"percentile":0.34915}]},"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 (0.41%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-27T06:17:25.000Z","detail":{"score":"6.5","severity":"MEDIUM","publishedAt":"2026-10-27T06:17:24.867Z"},"summary":"New CVE, medium severity (CVSS 6.5)."}],"references":[{"url":"https://gitlab.com/esaqa/esaqa/security-advisories/-/blob/master/advisories/CVE-2026-117470.md","source":"fdf66990-8419-4c8c-8848-ec15d75773b4"},{"url":"https://gitlab.com/esaqa/psono/psono-server","source":"fdf66990-8419-4c8c-8848-ec15d75773b4"},{"url":"https://gitlab.com/esaqa/psono/psono-server/-/blob/v7.2.3/psono/restapi/serializers/webauthn_verify.py","source":"fdf66990-8419-4c8c-8848-ec15d75773b4"},{"url":"https://gitlab.com/esaqa/psono/psono-server/-/commit/9c9a7f1701535df63370340dcc80210737dc495d","source":"fdf66990-8419-4c8c-8848-ec15d75773b4"},{"url":"https://gitlab.com/esaqa/psono/psono-server/-/releases/v7.2.4","source":"fdf66990-8419-4c8c-8848-ec15d75773b4"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-117470","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."}