Answer in brief
CVE-2026-53869 records a High severity (CVSS 8.7) vulnerability in Hermes Agent < 0.16.0 - DNS Rebinding Bypass via WebSocket Endpoints. The current sources do not mark it as known exploited. The current feed maps NousResearch/hermes-agent (generic), hermes-agent (pip). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps NousResearch/hermes-agent (generic), hermes-agent (pip). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| NousResearch/hermes-agentgeneric | >=0 <0.16.0 | 0.16.0 |
| hermes-agentpip | <0.16.0 | 0.16.0 |
Published upstream
Jun 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
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.
Quoted source text, attributed separately from HOL analysis.