CVE-2026-71963
Hermes Agent 0.18.2 - 0.21.0 RCE via git core.fsmonitor Config Injection
HIGH 8.6EPSS 0.9%
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.
- Affected
- NousResearch · hermes-agent
- CVSS v4.0 VULNCHECK
- 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS v3.1 VULNCHECK
- 8.8 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - EPSS
- 0.86% chance of exploitation in the next 30 days, 58th percentile
- Published
- 2026-09-03
Proof-of-concept exploits (2)
- https://www.manifold.security/blog/ai-coding-agents-git-hijack
- Boreas37/CVE-2026-71963-PoC0★ · 2026-09-27