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CVE-2026-103958— Server-side request forgery in the tool server and remote agent connection handling 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 1.7.0 版本之前，工具服务器（tool server）和远程代理（remote agent）连接处理中存在服务端请求伪造（SSRF）漏洞。攻击者可以通过在注册、更新或测试工具服务器或远程代理时提供精心构造的连接地址，利用该漏洞以经认证的远程用户身份获取应用程序自身容器角色的凭据，并读取来自任意内部网络位置的响应。 为解决此问题，建议用户升级至 1.7.0 或更高版本。

CVSS 7.6 · High EPSS 0.33% · P24

Affected Version Matrix 1

VendorProduct Version RangeStatus
AWS loom < 1.7.0 affected
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I. Basic Information for CVE-2026-103958

Vulnerability Information
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Vulnerability Title
Server-side request forgery in the tool server and remote agent connection handling in Loom for AWS
Source: CVE Program / CVE List V5
Vulnerability Description
Server-side request forgery in the tool server and remote agent connection handling in Loom for AWS before 1.7.0 might allow an authenticated remote user to obtain the credentials of the application's own container role and to read responses from arbitrary internal network locations, via a crafted connection address supplied when registering, updating or testing a tool server or remote agent. To remediate this issue, users should upgrade to version 1.7.0 or later.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
AWS loom 0 ~ 1.7.0 -

II. Public POCs for CVE-2026-103958

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III. Intelligence Information for CVE-2026-103958

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Vendor Advisories for CVE-2026-103958 (2)

Vendor Pages for CVE-2026-103958 (1)

Same Patch Batch · AWS · 2026-10-02 · 4 CVEs total

CVE-2026-103956 10.0 CRITICAL Missing authentication for critical function in Loom for AWS
CVE-2026-104019 9.0 CRITICAL OS command injection in the Studio Space startup validation script in Amazon SageMaker Dis
CVE-2026-103957 6.2 MEDIUM Server-side request forgery in the OAuth2 discovery handling in Loom for AWS

IV. Related Vulnerabilities

Same product: loom
Same vendor: AWS
Same weakness: CWE-918

V. Comments for CVE-2026-103958

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