Vulnerability in Nousresearch Hermes-Agent
CVE-2026-82020
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.
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N.
Affected products
Weakness classification (CWE)
References
- disclosure@vulncheck.com (release-notes)
- disclosure@vulncheck.com (issue-tracking)
- disclosure@vulncheck.com (patch)
- disclosure@vulncheck.com (patch)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-82020?
- CVE-2026-82020 is a medium-severity vulnerability in Nousresearch Hermes-Agent, classified under Files or Directories Accessible to External Parties. CVSS score: 6.8/10. Published 2026-08-28.
- How severe is CVE-2026-82020?
- Medium severity. CVSS v3 base score is 6.8 out of 10.