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CVE-2026-111385GHSA-rj3w-jrj7-x7c3

Nezha 2.1.0 before 2.3.15 Host Header Injection via MCP Transfer Tools

nezhahq nezha
Open in ThreatlineRecord JSON
CVSS
6.3Medium
ExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 21 Oct 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.19%Chance of exploitation activity in the next 30 days, higher than 8% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in2.3.15Fixed versionCVE List
Published16 Oct 2026Updated 21 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 2

  • nezhaaffected: 2.1.0 before 2.3.15CVE List
  • nezhaunaffected: 2.3.15CVE List

References 4