CVE-2026-82020: Nousresearch Hermes-Agent

Medium severity, CVSS 6.8. EPSS: 0.4% chance of exploitation in the next 30 days.

Hermes Agent 0.16.0 prior to 0.17.0 contains an improper path restriction vulnerability that allows attackers who can influence ingested message content to overwrite the credential store by bypassing sensitive-path guards that excluded the auth.json file. Attackers can craft malicious messages directing the agent's file-write tooling to overwrite the credential store without triggering any path-based protection, enabling credential tampering or unauthorized access.

Affected products

• Nousresearch Hermes-Agent: from 0.16.0, before 0.17.0 (fixed in 0.17.0); from 2026.6.5, before 2026.6.19 (fixed in 2026.6.19)

Published 2026-08-28. Last modified 2026-09-08.