CVE-2026-111385: URL Redirection to Untrusted Site ('Open Redirect') in nezhahq nezha
Description
Nezha versions from 2.1.0 up to but not including 2.3.15 contain a host header injection vulnerability in the mintTransferTool component. This vulnerability allows attackers who can control the Host header in a victim's MCP request to manipulate file upload or download URLs. Exploitation could enable redirection of file uploads or capture and replay of one-time download tokens to exfiltrate files. The vulnerability is classified as medium severity with a CVSS 4.0 score of 6.3.
CVSS v4.0
Score 6.3medium
Affected software
nezhahq
nezha
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-111385 is a host header injection vulnerability in Nezha's mintTransferTool that constructs fs.download_url and fs.upload_url from an unvalidated Host header. Attackers controlling the Host header in a victim's MCP request can redirect file uploads or capture one-time download tokens, which can then be replayed to exfiltrate files. This affects Nezha versions >=2.1.0 and <2.3.15.
Potential Impact
An attacker who can manipulate the Host header in a victim's MCP request can redirect file uploads or capture and replay one-time download tokens, potentially leading to unauthorized file exfiltration. This could compromise confidentiality of files transferred through the affected component.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-10-15T21:55:44.537Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ad17f0b2cdf04f656a4cf5d
Added to database: 10/16/2026, 01:34:03 UTC
Last enriched: 10/16/2026, 01:48:42 UTC
Last updated: 10/16/2026, 01:49:09 UTC
Views: 6
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