CVE-2026-71963

Description

Hermes Agent 0.18.2 through 0.21.0, fixed in commit f6234d0, contains a remote code execution vulnerability that allows attackers to execute arbitrary OS commands by supplying a malicious repository with a crafted .git/config that sets core.fsmonitor to an attacker-controlled command. When a user opens the malicious repository and sends any message, the agent triggers a git status index refresh which executes the injected command in the user's process context, exposing the full environment including configured provider API keys.

References

• https://github.com/NousResearch/hermes-agent/commit/f6234d00c5d59450adea1d7edd30ad3859375c79
• https://github.com/NousResearch/hermes-agent/pull/101483
• https://www.manifold.security/blog/ai-coding-agents-git-hijack
• https://www.vulncheck.com/advisories/hermes-agent-rce-via-git-core-fsmonitor-config-injection