CVE-2026-53870

EUVD-2026-37775
Hermes Agent before 0.16.0 creates response_store.db and webhook_subscriptions.json with world-readable permissions (mode 0o644), exposing conversation history and HMAC secrets to local users. Attackers with local filesystem access can read these files directly to obtain sensitive data including conversation history, tool payloads, prompts, and per-route HMAC secrets.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.5 MEDIUM
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Common Weakness Enumeration
References
https://github.com/NousResearch/hermes-agent/commit/3bace071bfadf2d2bec2ee048471a31ec920e3e8
https://github.com/NousResearch/hermes-agent/pull/30917
https://github.com/NousResearch/hermes-agent/pull/31469
https://github.com/NousResearch/hermes-agent/releases/tag/v2026.6.5
https://www.vulncheck.com/advisories/hermes-agent-sensitive-file-permission-vulnerability-in-store-files
https://github.com/NousResearch/hermes-agent/pull/30917