CVE-2026-111385CWE-601

CVE-2026-111385

Medium · published October 16, 2026

CVSS v3.1
4.8
EPSS
0%
Percentile
8.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.8 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS v4.0
6.3 · 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
EPSS
0.00194 · 8.6th percentile
Weakness
CWE-601 · URL Redirection to Untrusted Site ('Open Redirect')
Published
2026-10-16T07:18Z
References (5)
https://github.com/nezhahq/nezha/commit/36b742a7e9a81ed782363dd19efd77b7030fbd0f · [email protected]https://github.com/nezhahq/nezha/commit/c726930833937a0aebb2a924064f236faea889f6 · [email protected]https://github.com/nezhahq/nezha/security/advisories/GHSA-rj3w-jrj7-x7c3 · [email protected]https://www.vulncheck.com/advisories/nezha-2.1.0-before-2.3.15-host-header-injection-via-mcp-transfer-tools · [email protected]https://github.com/nezhahq/nezha/security/advisories/GHSA-rj3w-jrj7-x7c3 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 17 OCT 03:28Z
    EPSS moved — → 0%
    epss
  • 16 OCT 01:17Z
    Nezha 2.1.0 before 2.3.15 Host Header Injection via MCP Transfer Tools
    cvelistv5
  • 16 OCT 01:17Z
    Nezha 2.1.0 before 2.3.15 Host Header Injection via MCP Transfer Tools
    cvelistv5