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CVE-2026-53869

HIGH
7.5
CVSS 3.1
Description
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.

Metadata

CVE ID
CVE-2026-53869
State
PUBLISHED
Assigner
VulnCheck
Reserved
2026-06-10 21:23 UTC
Published
2026-06-17 17:57 UTC
Last updated
2026-06-17 17:57 UTC
Primary CWE
CWE-306
Missing Authentication for Critical Function
Vendor / Product
NousResearch / hermes-agent
Sources
cve.org  ·  NVD

Severity & Metrics

7.5 HIGH CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products (1)
VendorProductPlatformVersions
NousResearch hermes-agent — 0 < 0.16.0, 0.16.0
Weakness (CWE)
CWESourceDescription
CWE-306 cna Missing Authentication for Critical Function
CVSS scores (2)
ScoreSeverityVersionSourceVector
8.7 HIGH 4.0 cna 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
7.5 HIGH 3.1 cna CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References (5)
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