id: PYSEC-2026-2511
published: "2026-07-13T15:46:20.291382Z"
modified: "2026-07-13T16:04:16.605166Z"
aliases:
- CVE-2026-53870
- GHSA-99f9-j8r3-p853
summary: Hermes Agent creates response_store.db and webhook_subscriptions.json with world-readable permissions (mode 0o644)
details: 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:
- package:
    name: hermes-agent
    ecosystem: PyPI
    purl: pkg:pypi/hermes-agent
  ranges:
  - type: ECOSYSTEM
    events:
    - introduced: "0"
    - fixed: 0.16.0
  versions:
  - 0.13.0
  - 0.14.0
  - 0.15.0
  - 0.15.1
  - 0.15.2
references:
- type: ADVISORY
  url: https://nvd.nist.gov/vuln/detail/CVE-2026-53870
- type: WEB
  url: https://github.com/NousResearch/hermes-agent/pull/30917
- type: WEB
  url: https://github.com/NousResearch/hermes-agent/pull/31469
- type: WEB
  url: https://github.com/NousResearch/hermes-agent/commit/3bace071bfadf2d2bec2ee048471a31ec920e3e8
- type: PACKAGE
  url: https://github.com/NousResearch/hermes-agent
- type: WEB
  url: https://github.com/NousResearch/hermes-agent/releases/tag/v2026.6.5
- type: WEB
  url: https://www.vulncheck.com/advisories/hermes-agent-sensitive-file-permission-vulnerability-in-store-files
- type: PACKAGE
  url: https://pypi.org/project/hermes-agent
- type: ADVISORY
  url: https://github.com/advisories/GHSA-99f9-j8r3-p853
severity:
- type: CVSS_V3
  score: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- type: CVSS_V4
  score: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N