CVE-2026-111385 Nezha 2.1.0 before 2.3.15 Host Header Injection via MCP Transfer Tools
Attackers can manipulate Host headers to redirect file transfers or steal download tokens, leading to data exfiltration in Nezha.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-111385?
CVE-2026-111385 is a medium-severity vulnerability in nezhahq nezha, published on 16 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-601
Which versions are affected by CVE-2026-111385?
How do I fix CVE-2026-111385?
No fix has been published for CVE-2026-111385 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-111385 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111385 exists.
Sources
Also known as GHSA-7fqg-h9rw-ww63, GHSA-rj3w-jrj7-x7c3.