Hermes Agent < 0.16.0 - DNS Rebinding Bypass via WebSocket Endpoints
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.
CVE-2026-53869
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-53869
hermes-agent
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://github.com/NousResearch/hermes-agent",
"vendor": "NousResearch",
"product": "hermes-agent",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "0.16.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "0.16.0",
"versionType": "semver"
}
],
"packageURL": "pkg:pypi/hermes-agent",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-53869
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #12748 · Revision 1
- Added to Heist Feed
- Publisher date