What is CVE-2026-53870?

CVE-2026-53870 is a medium-severity vulnerability in Nousresearch Hermes-agent, classified under Incorrect Default Permissions. CVSS score: 5.5/10. Published 2026-06-17.

How severe is CVE-2026-53870?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Nousresearch Hermes-agent

CVE-2026-53870

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 rea…

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Nousresearch Hermes-agent — versions 0, 0.16.0

Weakness classification (CWE)

CWE-276 — Incorrect Default Permissions

References

disclosure@vulncheck.com (release-notes)
disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-53870?: CVE-2026-53870 is a medium-severity vulnerability in Nousresearch Hermes-agent, classified under Incorrect Default Permissions. CVSS score: 5.5/10. Published 2026-06-17.
How severe is CVE-2026-53870?: Medium severity. CVSS v3 base score is 5.5 out of 10.