Vulnerability · CVE-2026-84321
Nginx UI: Standalone short tokens survive administrative revocation in cache and authenticate again after account re-enable
Published Oct 15, 2026 · Nginx UI: Standalone short
Check if you run it
No confirmed exploitation is on record for CVE-2026-84321. EPSS is 0.21%. Act only if a listed version of Nginx UI: Standalone short is installed.
Gaps on this record
- The stored product name is a package slug. The name on this page is taken from the title (Nginx UI: Standalone short).
- No version range is stored. A customer cannot check an installed version against this record.
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- Unknown—
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.21%
- Remediation
- Not established
- Affected products
- golang github.com
Standalone short tokens issued for WebSocket and explicit-token authentication can survive administrative revocation in cache. If the same account is later re-enabled before the cache entry expires, the deleted short token becomes valid again.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- golang github.comversion unspecified
How to fix CVE-2026-84321
Recommended remediation
No required-action text, fix commit, or clear fixed-version range is stored yet.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2026-84321. EPSS is 0.21%. Act only if a listed version of Nginx UI: Standalone short is installed.
Which versions are affected?
Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 0.21%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Oct 15, 2026 · GitLab Advisory Database
Detected
Standalone short tokens issued for WebSocket and explicit-token authentication can survive administrative revocation in cache. If the same account is later re-enabled before the cache entry expires, the deleted short token becomes valid again.
Sources
- CVE.orgVulnerability recordCVE-2026-84321
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-84321
30-day exploitation probability 0.2%
first.org - GitLab Advisory DatabasePackage advisoryCVE-2026-84321
Standalone short tokens issued for WebSocket and explicit-token authentication can survive administrative revocation in cache. If the same account is later re-enabled before the cache entry expires, the deleted short token becomes valid again.
advisories.gitlab.com
Freshness
Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.