CVE-2026-103957

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.

CVSS v3 6.2 MEDIUM

6.2^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.7 / Impact : 4.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://aws.amazon.com/security/security-bulletins/2026-124-aws/
https://github.com/awslabs/loom/releases/tag/v1.7.0
https://github.com/awslabs/loom/security/advisories/GHSA-jcxf-gpf4-58hm

Configurations

No configuration.

History

02 Oct 2026, 20:17

Type	Values Removed	Values Added
References		() https://github.com/awslabs/loom/security/advisories/GHSA-jcxf-gpf4-58hm -

02 Oct 2026, 19:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-02 19:16

Updated : 2026-10-06 19:17

NVD link : CVE-2026-103957

Mitre link : CVE-2026-103957

CVE.ORG link : CVE-2026-103957

JSON object : View

Products Affected

No product.

CWE

CWE-201

Insertion of Sensitive Information Into Sent Data

CWE-918

Server-Side Request Forgery (SSRF)

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