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CVE-2026-9351— NousResearch hermes-agent read_file Tool file_tools.py _is_blocked_device path traversal

Quick assessment

Affected
NousResearch hermes-agent
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Hermes Agent是Nous Research开源的一款具备自我学习循环的AI代理工具。 Hermes Agent 2026.4.16及之前版本存在路径遍历漏洞，该漏洞源于read_file Tool组件文件tools/file_tools.py中函数_is_blocked_device，可能导致路径遍历。

CVSS 6.5 · Medium EPSS 0.79% · P56

Affected Version Matrix 17

VendorProduct Version RangeStatus
NousResearch hermes-agent 2026.4.0 affected
2026.4.1 affected
2026.4.2 affected
2026.4.3 affected
2026.4.4 affected
2026.4.5 affected
2026.4.6 affected
2026.4.7 affected
… +9 more rows
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I. Basic Information for CVE-2026-9351

Vulnerability Information
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Vulnerability Title
NousResearch hermes-agent read_file Tool file_tools.py _is_blocked_device path traversal
Source: CVE Program / CVE List V5
Vulnerability Description
A security flaw has been discovered in NousResearch hermes-agent up to 2026.4.16. This vulnerability affects the function _is_blocked_device of the file tools/file_tools.py of the component read_file Tool. Performing a manipulation results in path traversal. The attack may be initiated remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Hermes Agent 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Hermes Agent是Nous Research开源的一款具备自我学习循环的AI代理工具。 Hermes Agent 2026.4.16及之前版本存在路径遍历漏洞，该漏洞源于read_file Tool组件文件tools/file_tools.py中函数_is_blocked_device，可能导致路径遍历。
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 2026.4.0 cpe:2.3:a:nousresearch:hermes-agent:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-9351

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III. Intelligence Information for CVE-2026-9351

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News Coverage for CVE-2026-9351 (1)

Same Patch Batch · NousResearch · 2026-05-24 · 9 CVEs total

CVE-2026-9350 7.3 HIGH NousResearch hermes-agent Batch Runner approval.py check_all_command_guards authorization
CVE-2026-9353 7.3 HIGH NousResearch hermes-agent Skills Guard Multi-Word Prompt skills_guard.py injection
CVE-2026-9366 7.3 HIGH NousResearch hermes-agent prompt_builder.py _scan_context_content injection
CVE-2026-9368 7.3 HIGH NousResearch hermes-agent Environment Variable code_execution_tool.py execute_code sandbox
CVE-2026-9367 7.3 HIGH NousResearch hermes-agent terminal_tool approval.py detect_dangerous_command os command in
CVE-2026-9354 6.5 MEDIUM NousResearch hermes-agent Slack Agent/Mattermost Agent escape output
CVE-2026-9352 5.3 MEDIUM NousResearch hermes-agent Messaging Gateway local.py _make_run_env information disclosure
CVE-2026-9369 5.3 MEDIUM NousResearch hermes-agent CLI web-dashboard web_server.py _discover_dashboard_plugins comp

IV. Related Vulnerabilities

Same product: hermes-agent
Same vendor: NousResearch
Same weakness: CWE-22

V. Comments for CVE-2026-9351

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