{"id":"CVE-2026-53869","summary":"Hermes Agent \u003c 0.16.0 - DNS Rebinding Bypass via WebSocket Endpoints","details":"Hermes Agent before 0.16.0 contains a DNS rebinding vulnerability in WebSocket endpoints that allows remote attackers to bypass Host and Origin validation. FastAPI HTTP middleware does not execute for WebSocket upgrade requests on /api/pty, /api/ws, /api/pub, and /api/events endpoints, enabling attackers to exploit DNS rebinding and inject malicious commands or read terminal output.","aliases":["GHSA-4pqm-j46f-795x"],"modified":"2026-07-08T08:13:45.671767963Z","published":"2026-06-17T17:57:30.978Z","database_specific":{"unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"fixed":"0.16.0"}]},{"source":"DESCRIPTION","extracted_events":[{"fixed":"0.16.0"}]}],"cna_assigner":"VulnCheck","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53869.json","cwe_ids":["CWE-306"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53869.json"},{"type":"ADVISORY","url":"https://github.com/NousResearch/hermes-agent/releases/tag/v2026.6.5"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53869"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/hermes-agent-dns-rebinding-bypass-via-websocket-endpoints"},{"type":"REPORT","url":"https://github.com/NousResearch/hermes-agent/pull/30221"},{"type":"REPORT","url":"https://github.com/NousResearch/hermes-agent/pull/31685"},{"type":"FIX","url":"https://github.com/NousResearch/hermes-agent/commit/d9ec90585cf7616b5972e44cf8d92bb569fc3feb"},{"type":"PACKAGE","url":"https://github.com/NousResearch/hermes-agent"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/nousresearch/hermes-agent","events":[{"introduced":"0"},{"fixed":"d9ec90585cf7616b5972e44cf8d92bb569fc3feb"},{"fixed":"3c231eb3979ab9c57d5cd6d02f1d577a3b718b43"}],"database_specific":{"source":"REFERENCES"}}],"versions":["v2026.5.29","v2026.5.28","v2026.5.16","v2026.5.7","v2026.4.30","v2026.4.23","v2026.4.16","v2026.4.13","v2026.4.8","v2026.4.3","v2026.3.30","v2026.3.28","v2026.3.23","v2026.3.17","v2026.3.12"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53869.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]}