CVE-2026-71963 Details
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.
A remote code execution vulnerability has been identified in Hermes Agent versions 0.18.2 through 0.21.0. This vulnerability allows attackers to execute arbitrary operating system commands by sending a malicious repository that includes a crafted .git/config file. The injected command is executed in the user's process context when the agent refreshes the git status index, exposing the user's environment and any configured API keys.
Users can update to Hermes Agent version 0.21.0 or later, where this vulnerability has been patched.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 3, 2026CISA-ADP
Assessed Sep 3, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/NousResearch/hermes-agent/commit/f6234d00c5d59450adea1d7edd30ad3859375c79 | [email protected] | Source CodeVendor |
| https://github.com/NousResearch/hermes-agent/pull/101483 | [email protected] | Issue TrackingVendor |
| https://www.manifold.security/blog/ai-coding-agents-git-hijack | [email protected] | BundleTechnical Analysis |
| https://www.vulncheck.com/advisories/hermes-agent-rce-via-git-core-fsmonitor-config-injection | [email protected] | AdvisoryRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-78 | Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| NousResearch Hermes Agent | >= 0.18.2, <= 0.21.0 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 3, 2026 | New CVE Received | [email protected] |
| Sep 3, 2026 | CVE Modified | CISA-ADP |