CVE-2026-71963
Hermes Agent 0.18.2 - 0.21.0 RCE via git core.fsmonitor Config Injection
- State
- Published
- Severity
- 8.6 High
- Published
- Sep 3, 2026
- Updated
- Sep 3, 2026
- Reserved
- Aug 8, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.6 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 8.8 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Affected Products
| Product | Versions |
|---|---|
hermes-agentNousResearch |
|
References
- Manifold Blogtechnical-descriptionexploit
- Pull Requestissue-tracking
- Patch Commitpatch
- https://www.vulncheck.com/advisories/hermes-agent-rce-via-git-core-fsmonitor-config-injectionthird-party-advisory
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.