CVE-2026-111385mediumCWE-601

CVE-2026-111385: medium-severity vulnerability in nezhahq nezha

Nezha 2.1.0 before 2.3.15 Host Header Injection via MCP Transfer Tools

Published

13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 6.3epss 0.2%
exploitation probability
0.2%top 92% of all CVEs
observed exploitation
nono source reports it
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.
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
Affected products
nezhahq · nezha
Related CVEs — nezhahq nezha

In the same product, most dangerous first.

CVE-2026-53519CRITICALNezha Monitoring: Pre-auth path traversal via /dashboard.. prefix confusion leaks jwt_secret_keyEPSS 2.3%CVE-2026-62283CRITICALNezha Monitoring: Cross-tenant terminal/file-manager session hijack via WebSocket stream UUID without ownership checkEPSS 0.6%CVE-2026-46716CRITICALNezha Monitoring: RoleMember can run shell on every server (cross-tenant RCE) via POST /api/v1/cronEPSS 0.5%CVE-2026-59155MEDIUMNezha Monitoring: DDNS and Notification credential exposure via unredacted list APIEPSS 0.5%CVE-2026-100394MEDIUMNezha Monitoring: Whole-instance DoS in Nezha dashboard: a member can crash the process for every tenantEPSS 0.4%CVE-2026-53522MEDIUMNezha Monitoring: Unbounded WebSocket Streams — Resource Exhaustion DoSEPSS 0.4%
References
https://github.com/nezhahq/nezha/commit/36b742a7e9a81ed782363dd19efd77b7030fbd0fhttps://github.com/nezhahq/nezha/commit/c726930833937a0aebb2a924064f236faea889f6https://github.com/nezhahq/nezha/security/advisories/GHSA-rj3w-jrj7-x7c3https://www.vulncheck.com/advisories/nezha-2.1.0-before-2.3.15-host-header-injection-via-mcp-transfer-tools