Description
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.
CVSS breakdown
CVSS 4.0
Attack Vector
Local
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Confidentiality (Vulnerable System)
High
Integrity (Vulnerable System)
None
Availability (Vulnerable System)
None
Confidentiality (Subsequent System)
None
Integrity (Subsequent System)
None
Availability (Subsequent System)
None
CVSS 3.1
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected products
- nousresearch / hermes-agent0 – 0.16.0
- nousresearch / hermes-agent0.16.0 – 0.16.0
References
- PATCHhttps://github.com/NousResearch/hermes-agent/releases/tag/v2026.6.5
- PATCHhttps://github.com/NousResearch/hermes-agent/pull/30917
- PATCHhttps://github.com/NousResearch/hermes-agent/pull/31469
- PATCHhttps://github.com/NousResearch/hermes-agent/commit/3bace071bfadf2d2bec2ee048471a31ec920e3e8
- VENDOR_ADVISORYhttps://www.vulncheck.com/advisories/hermes-agent-sensitive-file-permission-vulnerability-in-store-files