---
title: "CVE-2026-107806: Nginx UI: Authenticated Remote Code Execution via Backup Restore App Config Overwrite"
url: https://erroneo.us/security/cve/CVE-2026-107806/
description: "CVE-2026-107806 (github.com/0xJacky/Nginx-UI (Go)): Nginx UI is a web user interface for the Nginx web server. From 2.3.8 until 2.5.0, an authenticated…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-10-09
date_modified: 2026-10-14
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-107806"
kev: false
cvss: 9.4
epss: 0.00405
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-107806: Nginx UI: Authenticated Remote Code Execution via Backup Restore App Config Overwrite

**Signal:** Critical, preconditions apply. Severe if exploited, but exploitation needs conditions that may not apply to you. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.4% , percentile 34: FIRST’s model estimates a 0.4% chance of exploitation activity in the next 30 days, higher than 34% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Needs an account (high (admin)). Exposure depends on who can log in.
- Only applies if your dependency tree includes github.com/0xJacky/Nginx-UI (Go) >= 1.9.10-0.20260421071512-7864e378f5cf, < 1.9.10-0.20260728074146-a467ed652591, fixed in 1.9.10-0.20260728074146-a467ed652591 . Check your lockfile, including transitive dependencies.

## What it is

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.

## Affected packages

- Go `github.com/0xJacky/Nginx-UI` >= 1.9.10-0.20260421071512-7864e378f5cf, < 1.9.10-0.20260728074146-a467ed652591 → fixed: 1.9.10-0.20260728074146-a467ed652591

## Affected products (CVE record)

- 0xJacky nginx-ui: >= 2.3.8, < 2.5.0

## Severity

- GitHub_M CVSS 4.0: 9.4 `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`
- GitHub CVSS 4.0: 9.0 `CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.40% probability of exploitation activity in the next 30 days; percentile 34.

## Sources

- [GitHub Advisory GHSA-p393-cf76-4jmr](https://github.com/advisories/GHSA-p393-cf76-4jmr)
- [CVE.org record CVE-2026-107806](https://www.cve.org/CVERecord?id=CVE-2026-107806)
- [NVD entry CVE-2026-107806](https://nvd.nist.gov/vuln/detail/CVE-2026-107806)
- [github.com](https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-p393-cf76-4jmr)
- [github.com](https://github.com/0xJacky/nginx-ui/commit/a467ed652591fc0cd1b466a1ec751b493faef9f7)
- [github.com](https://github.com/0xJacky/nginx-ui/releases/tag/v2.5.0)

---
Source page: https://erroneo.us/security/cve/CVE-2026-107806/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt