{"id":"CVE-2026-84321","title":"Nginx UI is a web user interface for the Nginx web server","summary":"Nginx UI is a web user interface for the Nginx web server. Prior to 2.4.1, GenerateShortToken creates standalone short-token records without a long Token value, but DeleteUserTokens invalidates cached entries only when the long Token fie…","severity":"medium","cvss":5.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","cwe":["CWE-613"],"published":"2026-10-12","updated":"2026-10-13","sourceUpdated":"2026-10-13T16:17:23.713","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-84321","references":[{"url":"https://github.com/0xJacky/nginx-ui/commit/23d1934099b05b2a01589b48129dc3d3159d91c2","label":"security-advisories@github.com"},{"url":"https://github.com/0xJacky/nginx-ui/releases/tag/v2.4.1","label":"security-advisories@github.com"},{"url":"https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-wq4w-vwvq-q3x9","label":"security-advisories@github.com"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-84321"},{"url":"https://github.com/advisories/GHSA-wq4w-vwvq-q3x9"},{"url":"https://github.com/0xJacky/nginx-ui"}],"tags":["nvd","cve.org","exploit-available","ghsa","go","osv"],"epss":0.0021,"epssPercentile":0.11096,"ingestedAt":"2026-10-12T22:05:40.370Z","vendor":"0xJacky","product":"nginx-ui","affected":["nginx-ui < 2.4.1"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-13T15:47:39.126608Z"},"aliases":["GHSA-wq4w-vwvq-q3x9","GO-2026-6801"],"ecosystem":"go","patched":["github.com/0xJacky/Nginx-UI 1.9.10-0.20260703131214-23d1934099b0"],"slug":"CVE-2026-84321","body":"## Overview\n\nNginx UI is a web user interface for the Nginx web server. Prior to 2.4.1, GenerateShortToken creates standalone short-token records without a long Token value, but DeleteUserTokens invalidates cached entries only when the long Token field is nonempty. A revoked short token can therefore remain in the short_token cache and authenticate again if the associated account is re-enabled before the cache entry expires because GetTokenUserByShortToken reads the surviving entry, restoring access to HTTP or WebSocket routes that accept short-token authentication. This issue is fixed in version 2.4.1.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-84321)\n\nAffected packages:\n\n- `github.com/0xJacky/Nginx-UI < 1.9.10-0.20260703131214-23d1934099b0`\n\nPatched in:\n\n- `github.com/0xJacky/Nginx-UI 1.9.10-0.20260703131214-23d1934099b0`\n\nSource: https://github.com/advisories/GHSA-wq4w-vwvq-q3x9","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":29.7,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":220965,"id":"CVE-2026-84321","ts":1792026943665,"field":"exploit_available","old":"false","new":"true"}]}