Advisoriesby Ibishermes-agentGHSA-4pqm-j46f-795x
hermes-agent: missing authentication
Fix: upgrade to 0.16.0 or later
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.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| hermes-agent PyPI | < 0.16.0 | 0.16.0 |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Severity from
- GitHub (reviewed advisory)
- Weakness
- CWE-306
- Also known as
- CVE-2026-53869, PYSEC-2026-2510
- nvd.nist.gov/vuln/detail/CVE-2026-53869
- github.com/NousResearch/hermes-agent/pull/30221
- github.com/NousResearch/hermes-agent/pull/31685
- github.com/NousResearch/hermes-agent/commit/d9ec90585cf7616b5972e44cf8d92bb569fc3feb
- github.com/NousResearch/hermes-agent
- github.com/NousResearch/hermes-agent/releases/tag/v2026.6.5
- www.vulncheck.com/advisories/hermes-agent-dns-rebinding-bypass-via-websocket-endpoints
More hermes-agent advisories
All hermes-agent
hermes-agent: insecure default permissionsCVE-2026-53870fixed in 0.16.0hermes-agent has an Injection issueCVE-2026-10223fixed in 0.15.0hermes-agent has an Uncontrolled Resource Consumption issueCVE-2026-10224no fix yethermes-agent has an Injection issueCVE-2026-10222fixed in 0.18.0hermes-agent has an Injection issueCVE-2026-10221no fix yethermes-agent has an Incorrect ComparisonCVE-2026-9369fixed in 0.15.0