CVE-2026-84320 Details
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.
A path traversal vulnerability has been identified in the Nginx UI auto backup feature, affecting versions prior to 2.4.3. The issue arises because the application fails to properly validate user-controlled backup names, allowing attackers to manipulate the file path and escape the designated storage directory. This can result in backup files being written outside of authorized locations, potentially exposing sensitive data. The vulnerability is particularly concerning for encrypted configuration backups, as it also allows the adjacent encryption key file to be written outside the validated directory.
Users are advised to update to Nginx UI version 2.4.3 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 12, 2026CISA-ADP
Assessed Oct 13, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/0xJacky/nginx-ui/commit/f92218e01054491fc1e6684dc6f7facaf8ab41eb | [email protected] | Source CodeVendor |
| https://github.com/0xJacky/nginx-ui/releases/tag/v2.4.3 | [email protected] | Release NotesVendor |
| https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-jrq7-xrjx-pcfw | [email protected] | AdvisoryExploitTechnical AnalysisVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-22 | Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| 0xJacky Nginx UI | <= 2.3.10 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 13, 2026 | CVE Modified | CISA-ADP |
| Oct 12, 2026 | New CVE Received | [email protected] |