Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/NousResearch/hermes-agent/commit/f6234d00c5d59450adea1d7edd30
- 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-con
FAQ
What is CVE-2026-71963?
CVE-2026-71963 is a vulnerability with a CVSS score of 8.8 (HIGH). 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 w...
How severe is CVE-2026-71963?
CVE-2026-71963 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-71963?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.