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TI-2026-71320 Aliases CVE-2026-84320GHSA-jrq7-xrjx-pcfw

Path traversal in Nginx UI auto backup writes files outside storage

Priority LOW 27CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · Low · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

Summary

Nginx UI before 2.4.3 is affected, as is the Go module github.com/0xJacky/Nginx-UI before 1.9.10-0.20260715121709-f92218e01054. The automatic backup name is not checked for path separators or parent-directory components, so the generated archive path can leave the validated storage directory (CWE-22). An authenticated user who can create or modify an automatic backup can write backup archives, and for encrypted configuration backups the key file, outside that directory with Nginx UI process privileges.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00167 6th percentileScored 2026-11-07
Fix Fixed nginx-ui (0xJacky): 2.4.3github.com/0xJacky/Nginx-UI (Go): 1.9.10-0.20260715121709-f92218e01054

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
0xJackynginx-uibefore 2.4.32.4.3Patch availableCNA
—github.com/0xJacky/Nginx-UI (Go)before 1.9.10-0.20260715121709-f92218e010541.9.10-0.20260715121709-f92218e01054Patch availableGHSA-jrq7-xrjx-pcfw
  • nginx-ui Vendor0xJacky Affected before 2.4.3 Fixed in 2.4.3 Patch available CNA
  • github.com/0xJacky/Nginx-UI (Go) Vendor— Affected before 1.9.10-0.20260715121709-f92218e01054 Fixed in 1.9.10-0.20260715121709-f92218e01054 Patch available GHSA-jrq7-xrjx-pcfw

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:nginxui:nginx_ui:*:*:*:*:*:*:*:*——0xJacky
  • cpe:2.3:a:nginxui:nginx_ui:*:*:*:*:*:*:*:* Versions — — ·0xJacky

Remediation

Upgrade nginx-ui to version 2.4.3 or later. Upgrade the Go module github.com/0xJacky/Nginx-UI to version 1.9.10-0.20260715121709-f92218e01054 or later.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA nginx-ui (0xJacky) Fixed in 2.4.3
  • Fix · GHSA-jrq7-xrjx-pcfw github.com/0xJacky/Nginx-UI (Go) Fixed in 1.9.10-0.20260715121709-f92218e01054 Advisory →

Timeline

  1. 2026-10-12 Threatist record created from CVE-2026-84320
  2. 2026-10-13 Priority changed: MEDIUM → LOW
  3. 2026-10-13 CISA SSVC decision points changed
  4. 2026-10-16 Alias added: GHSA-jrq7-xrjx-pcfw
  5. 2026-10-16 Fix available: Go/github.com/0xJacky/[email protected] · GHSA-jrq7-xrjx-pcfw
  6. 2026-10-16 CVSS score added · GHSA-jrq7-xrjx-pcfw
  7. 2026-10-16 Weakness changed · GHSA-jrq7-xrjx-pcfw
  8. 2026-10-16 5 new references · GHSA-jrq7-xrjx-pcfw

References

Advisory 1

Other 4

  • TI-2026-25478 Nginx UI: Unauthenticated MCP Endpoint Allows Remote Nginx Takeover CVSS 3.1CRITICAL 9.8
  • TI-2026-25472 nginx-ui Backup Restore Allows Tampering with Encrypted Backups CVSS 4.0CRITICAL 9.4
  • TI-2026-22288 Nginx UI: Unauthenticated Backup Download with Encryption Key Disclosure CVSS 3.1CRITICAL 9.8
  • TI-2024-15821 Nginx-UI arbitrary file write through the Import Certificate feature CVSS 3.1CRITICAL 9.8
  • TI-2026-70057 Code injection in Nginx UI backup restore allows code execution CVSS 4.0CRITICAL 9.4
  • TI-2026-32056 Nginx UI: Server-Side Request Forgery (SSRF) via Cluster Proxy Middleware Allows Access to Internal Services CVSS 3.1CRITICAL 9.9
See all 43 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences