Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-84288— NousResearch hermes-agent ACP Prompt Workflow session.py HermesACPAgent.prompt denial of service

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.

Nous Research Hermes Agent是Nous Research团队的一个基于机器学习的人工智能代理。 Nous Research Hermes Agent 0.18.2及之前版本存在资源管理错误漏洞，该漏洞源于对acp_adapter/session.py文件中HermesACPAgent.prompt函数的操纵，可能导致拒绝服务攻击。

CVSS 4.3 · Medium EPSS 0.47% · P39

Affected Version Matrix 3

VendorProduct Version RangeStatus
NousResearch hermes-agent 0.18.0 affected
0.18.1 affected
0.18.2 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-84288

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
NousResearch hermes-agent ACP Prompt Workflow session.py HermesACPAgent.prompt denial of service
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability has been found in NousResearch hermes-agent up to 0.18.2. This affects the function HermesACPAgent.prompt of the file acp_adapter/session.py of the component ACP Prompt Workflow. Such manipulation leads to denial of service. The attack may be performed from remote. The exploit has been disclosed to the public and may be used. 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:L/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
不恰当的资源关闭或释放
Source: CVE Program / CVE List V5
Vulnerability Title
Nous Research Hermes Agent 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nous Research Hermes Agent是Nous Research团队的一个基于机器学习的人工智能代理。 Nous Research Hermes Agent 0.18.2及之前版本存在资源管理错误漏洞，该漏洞源于对acp_adapter/session.py文件中HermesACPAgent.prompt函数的操纵，可能导致拒绝服务攻击。
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 0.18.0 cpe:2.3:a:nousresearch:hermes-agent:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-84288

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-84288

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-84288 (1)

Proof of Concept for CVE-2026-84288 (1)

Other References for CVE-2026-84288 (2)

Same Patch Batch · NousResearch · 2026-09-01 · 3 CVEs total

CVE-2026-84287 4.3 MEDIUM NousResearch hermes-agent Session Chat api_server.py denial of service
CVE-2026-84289 4.3 MEDIUM NousResearch hermes-agent MCP Tool mcp_tool.py list_tools memory allocation

IV. Related Vulnerabilities

Same product: hermes-agent
Same vendor: NousResearch
Same weakness: CWE-404

V. Comments for CVE-2026-84288

No comments yet

Leave a comment