CVE-2026-84320 · GHSA-jrq7-xrjx-pcfw
Nginx UI: Auto backup name allows path traversal outside validated storage path
- Risk score
- 54/100
- CVSS
- 6.3 v3.1
- Exploit chance (30 days)
- 0.2%
- Published
- 12 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- Nginx UI is a web user interface for the Nginx web server. Prior to 2.4.3, Nginx UI validates an automatic backup's storage_path, but AutoBackup.GetName returns a user-controlled name without rejecting path separators or parent-directory components, and downstream filename formatting embeds that result in the final ar…
- Affected
- github.com/0xJacky/Nginx-UI (go) < 1.9.10-0.20260715121709-f92218e01054
- Fix
- Upgrade github.com/0xJacky/Nginx-UI to 1.9.10-0.20260715121709-f92218e01054 or later.
- Exploitation
- Public proof of concept
Story map
At a glance
github.com/0xJacky/Nginx-UI: Amber, patch this week. 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 dir…
The flaws
- CVE-2026-84320: Nginx UI: Auto backup name allows path traversal outside validated storage path (CVSS 6.3 · EPSS 0%)
- CVE-2026-84316: Nginx UI: nginx config directive denylist (ValidateConfigFile) is bypassable via same-line ";" separation → authenticated directive injection (RCE on the official image) (CVSS 8.8 · EPSS 0%)
- CVE-2026-84317: Nginx UI: MCP nginx_config_add skips config directive validation → authenticated nginx directive injection (RCE on the official image) (CVSS 8.8 · EPSS 0%)
- CVE-2026-84318: Nginx UI: MCP `nginx_config_add` Bypasses Directive Validation — Authenticated RCE (CVSS 8.8 · EPSS 1%)
The fix
Upgrade github.com/0xJacky/Nginx-UI: 2.4.3 · 2.4.1 or later on your release line
Who is exposed: github.com/0xJacky/Nginx-UI (go) < 1.9.10-0.20260703131214-23d1934099b0
Where it stands
- Public proof of concept
Connects to
- Same weakness: Path traversal (CWE-22). 399 other warnings in 30 days
Why it is Yellow
- CVSS 6.3 medium
- Public exploit or proof of concept referenced
- On your watchlist: nginx, Go
Affected packages
| Package | Ecosystem | Vulnerable | Fixed in |
|---|---|---|---|
| github.com/0xJacky/Nginx-UI | go | < 1.9.10-0.20260715121709-f92218e01054 | 1.9.10-0.20260715121709-f92218e01054 |
References
- https://github.com/advisories/GHSA-jrq7-xrjx-pcfw
- https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-jrq7-xrjx-pcfw
- https://nvd.nist.gov/vuln/detail/CVE-2026-84320
- https://github.com/0xJacky/nginx-ui/commit/f92218e01054491fc1e6684dc6f7facaf8ab41eb
- https://github.com/0xJacky/nginx-ui/releases/tag/v2.4.3
- https://github.com/advisories/GHSA-jrq7-xrjx-pcfw
Original description
Nginx UI is a web user interface for the Nginx web server. Prior to 2.4.3, Nginx UI validates an automatic backup's storage_path, but AutoBackup.GetName returns a user-controlled name without rejecting path separators or parent-directory components, and downstream filename formatting embeds that result in the final archive filename. An authenticated user who can create or modify an automatic backup can cause filepath.Join to resolve the generated archive path outside the validated storage directory, allowing backup archives to be written with the Nginx UI process privileges. For encrypted configuration backups, the adjacent encryption key file can also be written outside the validated directory. This issue is fixed in version 2.4.3.
Last activity 12 Oct 2026. Patch Forecast updates every hour.