CVE-2026-111385
Nezha 2.1.0 before 2.3.15 Host Header Injection via MCP Transfer Tools
- State
- Published
- Severity
- 6.3 Medium
- Published
- Oct 16, 2026
- Updated
- Oct 21, 2026
- Reserved
- Oct 15, 2026
Description
Nezha from 2.1.0 before 2.3.15 contains a host header injection vulnerability in mintTransferTool that builds fs.download_url and fs.upload_url transfer URLs from the unvalidated Host header. Attackers who control the Host header seen on a victim's MCP request can redirect file uploads or capture one-time download tokens and replay them to exfiltrate files.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.3 Medium | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 4.8 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N | VulnCheck |
Weaknesses
- CWE-601 URL Redirection to Untrusted Site ('Open Redirect')
Affected Products
| Product | Versions |
|---|---|
nezhanezhahq |
|
References
- GitHub Security Advisory (GHSA-rj3w-jrj7-x7c3)vendor-advisory
- Patch Commitpatch
- Patch Commitpatch
- VulnCheck Advisory: Nezha 2.1.0 before 2.3.15 Host Header Injection via MCP Transfer Toolsthird-party-advisory
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