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CVE-2026-103957 Details

Description

Server-side request forgery in the OAuth2 discovery handling in Loom for AWS before 1.7.0 might allow an authenticated remote user to obtain the access token of another user of the deployment and to cause the application to issue requests to arbitrary internal network locations, via a crafted discovery document address supplied when registering a tool server or remote agent configured for delegated authentication. To remediate this issue, users should upgrade to version 1.7.0 or later.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: AMZNCVSS-B:6.2 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://aws.amazon.com/security/security-bulletins/2026-124-aws/	AMZN
https://github.com/awslabs/loom/releases/tag/v1.7.0	AMZN
https://github.com/awslabs/loom/security/advisories/GHSA-jcxf-gpf4-58hm	AMZN

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-201	Insertion of Sensitive Information Into Sent Data	AMZN
CWE-918	Server-Side Request Forgery (SSRF)	AMZN

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Oct 2, 2026	CVE Modified	AMZN
Oct 2, 2026	New CVE Received	AMZN