CVE-2026-103956— Missing authentication for critical function in Loom for AWS
Quick assessment
Affected
AWS loom
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.
在 Loom for AWS 1.6.1 版本之前的身份验证依赖组件中，存在一个针对关键函数的身份验证缺失漏洞。该漏洞使得远程攻击者能够获取对代理控制面的超级管理员权限，包括注册工具服务器、读取已存储的集成凭据以及重写绑定到托管代理角色的 IAM 角色策略，条件是只要在未配置身份提供者的部署环境中，向应用程序 API 发起任何请求即可利用此漏洞。 为修复此问题，用户应升级至版本 1.6.1 或更高版本。
In-the-Wild Activity Observed
github_trending · medium
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I. Basic Information for CVE-2026-103956
Vulnerability Information
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Vulnerability Title
Missing authentication for critical function in Loom for AWS
Source: CVE Program / CVE List V5
Vulnerability Description
Missing authentication for critical function in the authentication dependency in Loom for AWS before 1.6.1 allowed remote actors to obtain super-admin authority over the agent control plane, including registering tool servers, reading stored integration credentials, and rewriting the IAM role policies attached to managed agent roles, via any request to the application API in a deployment where no identity provider is configured.
To remediate this issue, users should upgrade to version 1.6.1 or later.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-103956
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-103956 (2)
Other References for CVE-2026-103956 (1)
Same Patch Batch · AWS · 2026-10-02 · 4 CVEs total
| CVE-2026-104019 | 9.0 CRITICAL | OS command injection in the Studio Space startup validation script in Amazon SageMaker Dis |
| CVE-2026-103958 | 7.6 HIGH | Server-side request forgery in the tool server and remote agent connection handling in Loo |
| CVE-2026-103957 | 6.2 MEDIUM | Server-side request forgery in the OAuth2 discovery handling in Loom for AWS |
IV. Related Vulnerabilities
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Same weakness: CWE-306
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V. Comments for CVE-2026-103956
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