CVE-2026-71963
Hermes Agent 0.18.2 - 0.21.0 RCE via git core.fsmonitor Config Injection
CVSS Score
8.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-78 |
| Vendor | nousresearch |
| Product | hermes-agent |
| Published | Sep 3, 2026 |
| Last Updated | Sep 3, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
NousResearch / hermes-agent
0.18.2 ≤ 0.21.0
References
manifold.security: https://www.manifold.security/blog/ai-coding-agents-git-hijack github.com: https://github.com/NousResearch/hermes-agent/pull/101483 github.com: https://github.com/NousResearch/hermes-agent/commit/f6234d00c5d59450adea1d7edd30ad3859375c79 vulncheck.com: https://www.vulncheck.com/advisories/hermes-agent-rce-via-git-core-fsmonitor-config-injection
Credits
Francisco Rosales