CVE-2026-84321

MediumCVSS 5.4/10Last modified Oct 13, 2026

Description

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 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.

Metrics

CVSS 3.1 5.4/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Weakness enumeration

CWE-613

Affected software

No affected versions have been published.

Timeline

Published
Oct 12, 2026
Last modified
Oct 13, 2026
NVD status
Deferred

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CVE-2026-84321: Medium severity, CVSS 5.4 | Vulnix