Open Redirect in Nezhahq Nezha
CVE-2026-111385
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.
Vulnerability class: Open Redirect
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/nezhahq/nezha/security/advisories/GHSA-rj3w-jrj7-x7c3 (vendor-advisory)
- github.com/nezhahq/nezha/commit/36b742a7e9a81ed782363dd19efd77b7030fbd0f (patch)
- github.com/nezhahq/nezha/commit/c726930833937a0aebb2a924064f236faea889f6 (patch)
- www.vulncheck.com/advisories/nezha-2.1.0-before-2.3.15-host-header-injection-vi… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111385?
- CVE-2026-111385 is a medium-severity vulnerability in Nezhahq Nezha, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 4.8/10. Published 2026-10-16.
- How severe is CVE-2026-111385?
- Medium severity. CVSS v3 base score is 4.8 out of 10.