CVE-2026-84321Medium· 5.4▾ TwilightPoC available

Nginx UI is a web user interface for the Nginx web server

▾ Twilight zone — High severity, or a signal on a lesser flaw

Depth score42/ 100 · Moderate

impact 29.7 · likelihood 0 · exploitation 12

⚡ Agent-ready:Raw markdown ↗JSON ↗

Proof of concept

A public proof-of-concept already exists for this vulnerability — see Exploit availability below.

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Published

Oct 12, 2026

Updated

Oct 13, 2026

CVSS

5.4

Vendor

0xJacky

Product

nginx-ui

CWE

CWE-613

Depth score

42 · Moderate

EPSS

0.21% · p11

Platforms

—

Source

NVD

Vector

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

CISA SSVC

decided 2026-10-13

Exploitation: poc
Automatable: no
Technical impact: partial

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.

EPSS history

Exploit-prediction probability, daily snapshots since Oct 13.

0.2% → 0.2%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

5 events · 14 days

Oct 12, 2026Published
Disclosed via NVD
Oct 13, 2026Record revised
Last analysed / modified upstream
Oct 13, 2026EPSS first tracked
0.2%
Oct 15, 2026Public exploit observed
Exploit / PoC code exists
Oct 26, 2026EPSS peak
0.2% → 0.2%

0xJacky CWE-613 #nvd #cve.org #exploit-available #ghsa #go #osv

Affected

nginx-ui < 2.4.1

Patched in

github.com/0xJacky/Nginx-UI 1.9.10-0.20260703131214-23d1934099b0

Full technical detail▾

Overview

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.

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

Package advisory (CVE-2026-84321)

Affected packages:

github.com/0xJacky/Nginx-UI < 1.9.10-0.20260703131214-23d1934099b0

Patched in:

github.com/0xJacky/Nginx-UI 1.9.10-0.20260703131214-23d1934099b0

Source: https://github.com/advisories/GHSA-wq4w-vwvq-q3x9

References

Change history

Field changes observed since this record was first indexed.

Oct 15, 2026Public exploit / PoC published

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd#cve.org#exploit-available#ghsa#go#osv

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