{"id":"CVE-2026-111385","summary":"Nezha 2.1.0 before 2.3.15 Host Header Injection via MCP Transfer Tools","details":"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.","aliases":["GHSA-rj3w-jrj7-x7c3"],"modified":"2026-10-17T02:48:19.144496204Z","published":"2026-10-16T01:17:54.057Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-601"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111385.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111385.json"},{"type":"ADVISORY","url":"https://github.com/nezhahq/nezha/security/advisories/GHSA-rj3w-jrj7-x7c3"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111385"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/nezha-2.1.0-before-2.3.15-host-header-injection-via-mcp-transfer-tools"},{"type":"FIX","url":"https://github.com/nezhahq/nezha/commit/36b742a7e9a81ed782363dd19efd77b7030fbd0f"},{"type":"FIX","url":"https://github.com/nezhahq/nezha/commit/c726930833937a0aebb2a924064f236faea889f6"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/nezhahq/nezha","events":[{"introduced":"1d70d2992ec7ee5fac2e12ce15d0ea8005a589d4"},{"fixed":"36b742a7e9a81ed782363dd19efd77b7030fbd0f"},{"fixed":"c726930833937a0aebb2a924064f236faea889f6"}],"database_specific":{"extracted_events":[{"introduced":"2.1.0"},{"fixed":"2.3.15"}],"source":["DESCRIPTION","REFERENCES"]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-111385.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}