{
"id": "GHSA-4pqm-j46f-795x",
"aliases": [
"CVE-2026-53869"
],
"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.",
"summary": "Hermes Agent contains a DNS rebinding vulnerability in WebSocket endpoints that allows remote attackers to bypass Host and Origin validation",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.16.0"
}
]
}
],
"package": {
"name": "hermes-agent",
"ecosystem": "PyPI"
}
}
],
"modified": "2026-06-19T14:47:03Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"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"
}
],
"published": "2026-06-17T21:34:38Z",
"references": [
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53869",
"type": "ADVISORY"
},
{
"url": "https://github.com/NousResearch/hermes-agent/pull/30221",
"type": "WEB"
},
{
"url": "https://github.com/NousResearch/hermes-agent/pull/31685",
"type": "WEB"
},
{
"url": "https://github.com/NousResearch/hermes-agent/commit/d9ec90585cf7616b5972e44cf8d92bb569fc3feb",
"type": "WEB"
},
{
"url": "https://github.com/NousResearch/hermes-agent",
"type": "PACKAGE"
},
{
"url": "https://github.com/NousResearch/hermes-agent/releases/tag/v2026.6.5",
"type": "WEB"
},
{
"url": "https://www.vulncheck.com/advisories/hermes-agent-dns-rebinding-bypass-via-websocket-endpoints",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-306"
],
"severity": "HIGH",
"github_reviewed": true,
"nvd_published_at": "2026-06-17T19:18:10Z",
"github_reviewed_at": "2026-06-19T14:47:03Z"
}
}