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CVE-2026-91988— atomic-agents-stack before 1.1.0 Remote Code Execution via HTTP MCP

Quick assessment

Affected
dep0we atomic-agents-stack
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.

以下是该漏洞描述的中文翻译： atomic-agents-stack 在 1.1.0 版本之前，其 HTTP MCP 服务器注册表后端工厂接受明文 HTTP 协议，使得网络中间人攻击者能够篡改目录（catalog）响应。攻击者可以通过注入任意命令和参数值，这些值会被 MCPClientPool 作为本地子进程启动，从而在代理（agent）主机上实现任意代码执行。

CVSS 8.1 · High

Affected Version Matrix 2

VendorProduct Version RangeStatus
dep0we atomic-agents-stack < 1.1.0 affected
1.1.0 unaffected
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I. Basic Information for CVE-2026-91988

Vulnerability Information
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Vulnerability Title
atomic-agents-stack before 1.1.0 Remote Code Execution via HTTP MCP
Source: CVE Program / CVE List V5
Vulnerability Description
atomic-agents-stack before 1.1.0 accepts cleartext HTTP schemes in the HTTP MCP server-registry backend factory, allowing network man-in-the-middle attackers to rewrite catalog responses. Attackers can inject arbitrary command and argument values that are spawned as local subprocesses by MCPClientPool to achieve code execution on the agent host.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
敏感数据的明文传输
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
dep0we atomic-agents-stack 0 ~ 1.1.0 -

II. Public POCs for CVE-2026-91988

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III. Intelligence Information for CVE-2026-91988

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Vendor Advisories for CVE-2026-91988 (2)

Same Patch Batch · dep0we · 2026-09-15 · 3 CVEs total

CVE-2026-91989 7.5 HIGH atomic-agents-stack before 1.1.0 Path Traversal via dashboard serve.py
CVE-2026-91987 6.5 MEDIUM atomic-agents-stack before 1.1.0 Cost Guardrail Bypass via Unknown Model

IV. Related Vulnerabilities

Same product: atomic-agents-stack
Same vendor: dep0we
Same weakness: CWE-319

V. Comments for CVE-2026-91988

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