# CVE-2026-103957: Server-side request forgery in the OAuth2 discovery handling in Loom for AWS

> CVE-2026-103957: Server-side request forgery in the OAuth2 discovery handling in Loom for AWS. CVSS 6.2 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-103957
Last updated: 2026-10-09T16:36:36Z

- Published: 2026-10-02 19:06 UTC · Updated: 2026-10-09 16:36 UTC · Assigner: AMZN
- CVSS: 6.2 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:N/A:N
- EPSS: 0.40%, 34th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-201, CWE-918

## 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.

## Affected vendors and products

- AWS: loom

## Tracked companies

- [Amazon Web Services](https://rewindex.com/company/aws.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-103957)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-103957)
- [https://aws.amazon.com/security/security-bulletins/2026-124-aws/](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/releases/tag/v1.7.0)
- [https://github.com/awslabs/loom/security/advisories/GHSA-jcxf-gpf4-58hm](https://github.com/awslabs/loom/security/advisories/GHSA-jcxf-gpf4-58hm)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-103957 · Markdown: https://rewindex.com/cve/CVE-2026-103957.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-103957 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T04:06:19.362Z