CVE-2026-53870: Nousresearch Hermes-Agent

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Nousresearch Hermes-Agent: before 0.16.0 (fixed in 0.16.0)

Published 2026-06-17. Last modified 2026-10-08.