Vulnerability 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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- 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
FAQ
What is CVE-2026-103957?
CVE-2026-103957 is a vulnerability with a CVSS score of 6.2 (MEDIUM). 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 c...
How severe is CVE-2026-103957?
CVE-2026-103957 has been rated MEDIUM with a CVSS base score of 6.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-103957?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.