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CVE-2026-107806

CRITICAL 9.4

Published 2026-10-09 · Last modified 2026-10-14

Nginx UI is a web user interface for the Nginx web server. From 2.3.8 until 2.5.0, an authenticated administrator with an active secure session can submit attacker-controlled portable backup key material and a matching manifest to POST /api/restore. The restore flow trusts the supplied key, decrypts attacker-controlled contents, and replaces the live app.ini, including protected nginx command settings such as TestConfigCmd. Triggering POST /api/nginx/test then executes the restored command in the Nginx UI runtime context, affecting confidentiality, integrity, and availability. This issue is fixed in version 2.5.0.

ELEVATED IMPACT

Severe if exploited (CVSS 9.4), but no known exploitation and low modeled probability. Patch on a normal cadence.

Exploitation likelihood

0.6%chance of exploitation in 30 days · 47th percentile

○ In CISA KEV ○ Catalogued PoC

Impact if exploited

9.4CVSS 4.0 · CRITICAL

  • ConfidentialityHigh
  • IntegrityHigh
  • AvailabilityHigh

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ⚠Privileges: Requires an admin / high-privilege account
  • ✓User interaction: No user interaction needed
  • ✓Complexity: No special conditions — reliably repeatable
  • ✓Requirements: No special attack requirements

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

Search GitHub now — results may be empty or unverified.

Tracked sources are checked daily for recent CVEs, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Data snapshot:

Affected

Vendors 0xjacky Nginxui

Products Nginx Ui Nginx Ui

Weakness (CWE)

  • CWE-94: : Improper Control of Generation of Code ('Code Injection')

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA: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
    • Introduced version (included): 1.9.10-0.20260421071512-7864e378f5cf
    • Fixed boundary (excluded): 1.9.10-0.20260728074146-a467ed652591
    Additional upstream package constraints
    {
  "database": {
    "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-p393-cf76-4jmr/GHSA-p393-cf76-4jmr.json"
  }
}
    GitHub Advisory Database · GHSA-p393-cf76-4jmr · Updated 2026-10-19T21:41:10.824670129Z
  • github.com/0xJacky/Nginx-UI Go

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

    SEMVER range
    • Introduced version (included): 1.9.10-0.20260421071512-7864e378f5cf
    • Fixed boundary (excluded): 1.9.10-0.20260728074146-a467ed652591
    Additional upstream package constraints
    {
  "ecosystem": {},
  "database": {
    "source": "https://vuln.go.dev/ID/GO-2026-6741.json"
  }
}
    Go Vulnerability Database · GO-2026-6741 · Updated 2026-10-19T21:31:53.113603304Z

Unverified PoC candidates

Catalogue matches for further research. These repositories have not been validated as working exploits.

1 candidate
  • https://github.com/murrez/CVE-2026-107806

    CVE-2026-107806 — nginx-ui 2.3.8–2.4.x auth RCE via forged backup restore (TestConfigCmd). PoCbit PoC: GET /api/backup, tamper app.ini, POST /api/restore, POST /api/nginx/test. check/exploit, batch url|JWT. Fixed 2.5.0. https://pocbit.org/pocs/cve-2026-107806

    PoC-in-GitHub · CVE-2026-107806
    PoC-in-GitHub · CVE-2026-107806 · Updated 2026-10-23T01:47:42Z

Known Affected Software Configurations

VendorProductVersion range
NginxuiNginx Ui≥ 2.3.8 and < 2.5.0

All CVSS metrics

  • CRITICAL 9.4 v4.0 · CNA Primary
    CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
  • CRITICAL 9.4 v4.0 · NVD Secondary
    CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  • HIGH 7.2 v3.1 · NVD Primary
    CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

References

Exploit-tagged references (not proof of a PoC)

Patches & mitigations

Advisories

Technical & other

Sources: NVD · CVE.org · EPSS