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CVE-2026-84316

HIGH 8.8

Published 2026-10-12 · Last modified 2026-10-13

Nginx UI is a web user interface for the Nginx web server. Prior to 2.4.1, config.ValidateConfigDirectives splits configuration by newline and checks only the first directive token on each line even though Nginx permits multiple semicolon-separated directives on one line. An authenticated caller can place a benign directive first and a restricted load_module, js_import, perl, or user root directive later on the same line, or can use an unrestricted include directive to load restricted content. These mechanisms bypass validation on REST, nginx_config_modify, site, and stream write paths; when an executable module is available, the injected configuration can execute code in the Nginx worker context. This issue is fixed in version 2.4.1.

ELEVATED IMPACT

Severe if exploited (CVSS 8.8), but no known exploitation and low modeled probability. Patch on a normal cadence.

Exploitation likelihood

0.5%chance of exploitation in 30 days · 43rd percentile

○ In CISA KEV ○ Catalogued PoC

Impact if exploited

8.8CVSS 3.1 · HIGH

  • ConfidentialityHigh
  • IntegrityHigh
  • AvailabilityHigh

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ⚠Privileges: Requires a low-privilege account
  • ✓User interaction: No user interaction needed
  • ✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

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Data snapshot:

Affected

Vendors 0xjacky

Products Nginx Ui

Weakness (CWE)

  • CWE-20: : Improper Input Validation
  • CWE-184: : Incomplete List of Disallowed Inputs

CVSS vector

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

References and research data (JSON)

Packages and version ranges

Each advisory describes its own package and affected ranges. A boundary applies to that range; it is not a universal upgrade recommendation.

  • github.com/0xJacky/Nginx-UI Go

    pkg:golang/github.com/0xJacky/Nginx-UI

    SEMVER range
    • All earlier versions (introduced 0)
    • Fixed boundary (excluded): 1.9.10-0.20260703131214-23d1934099b0
    Additional upstream package constraints
    {
  "database": {
    "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-cf23-7qxj-xmhr/GHSA-cf23-7qxj-xmhr.json"
  }
}
    GitHub Advisory Database · GHSA-cf23-7qxj-xmhr · Updated 2026-10-19T21:41:05.726665020Z
  • github.com/0xJacky/Nginx-UI Go

    pkg:golang/github.com/0xJacky/Nginx-UI

    SEMVER range
    • All earlier versions (introduced 0)
    • Fixed boundary (excluded): 1.9.10-0.20260703131214-23d1934099b0
    Additional upstream package constraints
    {
  "ecosystem": {},
  "database": {
    "source": "https://vuln.go.dev/ID/GO-2026-6782.json"
  }
}
    Go Vulnerability Database · GO-2026-6782 · Updated 2026-10-19T21:31:50.614201466Z

All CVSS metrics

  • HIGH 8.8 v3.1 · CNA Primary
    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • HIGH 8.8 v3.1 · NVD Secondary
    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Exploit-tagged references (not proof of a PoC)

Advisories

Technical & other

Sources: NVD · CVE.org · EPSS