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CVE-2026-71963— Hermes Agent 0.18.2 - 0.21.0 RCE via git core.fsmonitor Config Injection

Quick assessment

Affected
NousResearch hermes-agent
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Nous Research Hermes Agent是Nous Research团队开源的一款具备自我学习循环的AI代理工具。 NousResearch Hermes Agent 0.18.2版本至0.21.0版本存在命令注入漏洞，该漏洞源于恶意仓库中的特制.git/config文件将core.fsmonitor设置为攻击者控制的命令，可能导致攻击者执行任意OS命令，并暴露包括提供商API密钥在内的完整环境信息。

CVSS 8.8 · High EPSS 0.86% · P56

Affected Version Matrix 2

VendorProduct Version RangeStatus
NousResearch hermes-agent 0.18.2≤ 0.21.0 affected
f6234d00c5d59450adea1d7edd30ad3859375c79 unaffected
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I. Basic Information for CVE-2026-71963

Vulnerability Information
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Vulnerability Title
Hermes Agent 0.18.2 - 0.21.0 RCE via git core.fsmonitor Config Injection
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
NousResearch Hermes Agent 命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nous Research Hermes Agent是Nous Research团队开源的一款具备自我学习循环的AI代理工具。 NousResearch Hermes Agent 0.18.2版本至0.21.0版本存在命令注入漏洞，该漏洞源于恶意仓库中的特制.git/config文件将core.fsmonitor设置为攻击者控制的命令，可能导致攻击者执行任意OS命令，并暴露包括提供商API密钥在内的完整环境信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
NousResearch hermes-agent 0.18.2 ~ 0.21.0 -

II. Public POCs for CVE-2026-71963

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
Success marker: VULNERABLE: RCE via git core.fsmonitor config injection - proof token PROOF_f02f5301d82cea58 exfiltrated by attacker-controlled fsmonitor command
Reproduction recording is a Pro+ exclusive
Watch the full sandbox build + live exploit recording for this CVE. Limited-time ¥499/mo.
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claude_code · 7943 chars
GitHub 复现环境（可 clone 直接跑）
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
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III. Intelligence Information for CVE-2026-71963

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Patches & Fixes for CVE-2026-71963 (1)

Vendor Advisories for CVE-2026-71963 (1)

Security Blog Posts for CVE-2026-71963 (1)

Same Patch Batch · NousResearch · 2026-09-03 · 4 CVEs total

CVE-2026-85105 7.3 HIGH NousResearch hermes-agent Session Management s71.py _sess_nowait authorization
CVE-2026-85106 6.3 MEDIUM NousResearch hermes-agent Link Title Fetch index.tsx fetchLinkTitle server-side request fo
CVE-2026-85107 4.3 MEDIUM NousResearch hermes-agent Electron Main Process main.ts resourceBufferFromUrl allocation o

IV. Related Vulnerabilities

Same product: hermes-agent
Same vendor: NousResearch
Same weakness: CWE-78

V. Comments for CVE-2026-71963

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