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.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-613"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84321.json"
}{
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "2.4.1"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "23d1934099b05b2a01589b48129dc3d3159d91c2"
}
],
"source": "REFERENCES_COMMIT"
},
{
"original_tag": "v2.4.1",
"range": [
{
"fixed": "0540f3ecf7824e9adbe408f3166d151651ccf4dd"
}
],
"source": "REFERENCES_TAG"
}
]
}