---
id: CVE-2026-53870
title: >-
  Hermes Agent creates response_store.db and webhook_subscriptions.json with
  world-readable permissions (mode 0o644)
summary: >-
  Hermes Agent creates response_store.db and webhook_subscriptions.json with
  world-readable permissions (mode 0o644)
severity: medium
cvss: 5.5
cwe:
  - CWE-276
vendor: hermes-agent
product: hermes-agent
ecosystem: pip
affected:
  - hermes-agent < 0.16.0
patched:
  - hermes-agent 0.16.0
published: '2026-06-17'
updated: '2026-06-19'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-99f9-j8r3-p853'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-53870'
  - url: 'https://github.com/NousResearch/hermes-agent/pull/30917'
  - url: 'https://github.com/NousResearch/hermes-agent/pull/31469'
  - url: >-
      https://github.com/NousResearch/hermes-agent/commit/3bace071bfadf2d2bec2ee048471a31ec920e3e8
  - url: 'https://github.com/NousResearch/hermes-agent/releases/tag/v2026.6.5'
  - url: >-
      https://www.vulncheck.com/advisories/hermes-agent-sensitive-file-permission-vulnerability-in-store-files
  - url: 'https://github.com/advisories/GHSA-99f9-j8r3-p853'
tags:
  - ghsa
  - pip
epss: 0.00154
epssPercentile: 0.03786
ingestedAt: '2026-06-29T14:31:47.165Z'
---

## Overview

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 packages

- `hermes-agent < 0.16.0`

## Remediation

Upgrade to a patched release:

- `hermes-agent 0.16.0`