{"id":"CVE-2026-107808","state":"PUBLISHED","title":"Nginx UI: Authentication bypass: password login does not enforce a passkey-only second factor (2FA bypass)","description":"Nginx UI is a web user interface for the Nginx web server. From 2.0.0 until 2.5.0, POST /api/login checks EnabledOTP but does not require a WebAuthn assertion when EnabledPasskey is true and no TOTP secret is configured. A passkey-only account is therefore issued a session after password verification, despite Enabled2FA reporting that the account has a second factor. An attacker who obtains the password can take over the account and reach administrative functionality without the registered passkey. This issue is fixed in version 2.5.0.","publishedAt":"2026-10-09T15:11:44.387Z","updatedAt":"2026-10-09T17:19:53.438Z","severity":{"score":8.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["0xJacky nginx-ui"],"affected":[{"vendor":"0xJacky","product":"nginx-ui","versions":[{"version":">= 2.0.0, < 2.5.0","status":"affected"}]}],"references":["https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-45gv-9wjv-xh7p","https://github.com/0xJacky/nginx-ui/commit/95cd21b70814e5d9a48a359aa238aeea1ac97429","https://github.com/0xJacky/nginx-ui/releases/tag/v2.5.0"],"weaknesses":["CWE-287","CWE-305","CWE-308"],"ingestedAt":"2026-10-29T20:10:23.711Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/107xxx/CVE-2026-107808.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-107808","state":"PUBLISHED","datePublished":"2026-10-09T15:11:44.387Z","dateUpdated":"2026-10-09T17:19:53.438Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-10-08T21:23:59.820Z"},"containers":{"cna":{"title":"Nginx UI: Authentication bypass: password login does not enforce a passkey-only second factor (2FA bypass)","descriptions":[{"lang":"en","value":"Nginx UI is a web user interface for the Nginx web server. From 2.0.0 until 2.5.0, POST /api/login checks EnabledOTP but does not require a WebAuthn assertion when EnabledPasskey is true and no TOTP secret is configured. A passkey-only account is therefore issued a session after password verification, despite Enabled2FA reporting that the account has a second factor. An attacker who obtains the password can take over the account and reach administrative functionality without the registered passkey. This issue is fixed in version 2.5.0."}],"affected":[{"vendor":"0xJacky","product":"nginx-ui","versions":[{"version":">= 2.0.0, < 2.5.0","status":"affected"}]}],"references":[{"url":"https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-45gv-9wjv-xh7p","name":"https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-45gv-9wjv-xh7p","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/0xJacky/nginx-ui/commit/95cd21b70814e5d9a48a359aa238aeea1ac97429","name":"https://github.com/0xJacky/nginx-ui/commit/95cd21b70814e5d9a48a359aa238aeea1ac97429","tags":["x_refsource_MISC"]},{"url":"https://github.com/0xJacky/nginx-ui/releases/tag/v2.5.0","name":"https://github.com/0xJacky/nginx-ui/releases/tag/v2.5.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-287","lang":"en","description":"CWE-287: Improper Authentication","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-305","lang":"en","description":"CWE-305: Authentication Bypass by Primary Weakness","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-308","lang":"en","description":"CWE-308: Use of Single-factor Authentication","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-09T15:11:44.387Z"},"source":{"advisory":"GHSA-45gv-9wjv-xh7p","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-45gv-9wjv-xh7p","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-09T17:16:59.141852Z","id":"CVE-2026-107808","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-09T17:19:53.438Z"}}]}}}