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Advisories

Hermes Agent 0.16.0 < 0.17.0 Credential Store Overwrite via File-Write Tool

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severity
high
date
Affecting

  • hermes-agent >= 0.16.0, < 0.17.0

  • hermes-agent >= 2026.6.5, < 2026.6.19

CWE
  • CWE-552 Files or Directories Accessible to External Parties
CVSS
7.6
CVSS V4 Vector
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Credit
Zubair Ashraf (@zashraf1337), Helmet Security
Description
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.

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