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  5. CVE-2026-53870

CVE-2026-53870: Hermes Agent creates response_store.db and webhook_subscriptions.json with world-readable permissions (mode 0o644)

June 17, 2026 (updated June 19, 2026)

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.

References

  • github.com/NousResearch/hermes-agent/commit/3bace071bfadf2d2bec2ee048471a31ec920e3e8
  • github.com/NousResearch/hermes-agent/pull/30917
  • github.com/NousResearch/hermes-agent/pull/31469
  • github.com/NousResearch/hermes-agent/releases/tag/v2026.6.5
  • github.com/advisories/GHSA-99f9-j8r3-p853
  • nvd.nist.gov/vuln/detail/CVE-2026-53870
  • www.vulncheck.com/advisories/hermes-agent-sensitive-file-permission-vulnerability-in-store-files

Code Behaviors & Features

Detect and mitigate CVE-2026-53870 with GitLab Dependency Scanning

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Affected versions

All versions before 0.16.0

Fixed versions

  • 0.16.0

Solution

Upgrade to version 0.16.0 or above.

Impact 5.5 MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Learn more about CVSS

Weakness

  • CWE-276: Incorrect Default Permissions

Source file

pypi/hermes-agent/CVE-2026-53870.yml

Spotted a mistake? Edit the file on GitLab.

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