Nginx UI: Server-Side Request Forgery (SSRF) via Cluster Proxy Middleware Allows Access to Internal Services
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.
Summary
Nginx UI is a web user interface for the Nginx web server. In 2.3.4 and earlier, an authenticated user can perform Server-Side Request Forgery (SSRF) by creating a cluster node pointing to an arbitrary internal URL and then sending API requests with the X-Node-ID header. The Proxy middleware forwards these requests to the attacker-specified internal address, bypassing network segmentation and enabling access to services bound to localhost or internal networks.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- 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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| 0xJacky | nginx-ui | up to 2.3.4 | — | No fix listed | CNA |
| — | github.com/0xJacky/Nginx-UI (Go) | up to 2.3.4 | — | No fix listed | GHSA-wr32-99hh-6f35 |
- nginx-ui Vendor0xJacky Affected up to 2.3.4 Fixed in — No fix listed CNA
- github.com/0xJacky/Nginx-UI (Go) Vendor— Affected up to 2.3.4 Fixed in — No fix listed GHSA-wr32-99hh-6f35
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-44015
- 2026-10-03 Alias added: GHSA-wr32-99hh-6f35
References
More 0xJacky Nginx Ui vulnerabilities
- 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-2026-30543 nginx-ui: Unauthenticated first-boot instance claim via POST /api/install allows remote bootstrap takeover CVSS 3.1CRITICAL 9.8
Sources
- CVE-2026-44015 · CVE Program
- CVE-2026-44015 · NVD
- FIRST EPSS
- GHSA-wr32-99hh-6f35 · GitHub Advisory Database · CC BY 4.0
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