Missing authentication for critical function in the authentication dependency in Loom for AWS before 1.6.1 allowed remote actors to obtain super-admin authority over the agent control plane, including registering tool servers, reading stored integration credentials, and rewriting the IAM role policies attached to managed agent roles, via any request to the application API in a deployment where no identity provider is configured.



To remediate this issue, users should upgrade to version 1.6.1 or later.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact High

Subsequent System Integrity Impact High

Subsequent System Availability Impact High

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable yes

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
AWS loom unaffected
Version Status Constraints
0 affected < 1.6.1

No data.

No data.

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No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://aws.amazon.com/security/security-bulletins/2026-124-aws/ cve-icon cve-icon
https://github.com/awslabs/loom/releases/tag/v1.6.1 cve-icon cve-icon
https://github.com/awslabs/loom/security/advisories/GHSA-vgmj-998f-r8mp cve-icon cve-icon
History

Fri, 02 Oct 2026 22:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Fri, 02 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
References

Fri, 02 Oct 2026 19:15:00 +0000

Type Values Removed Values Added
Description Missing authentication for critical function in the authentication dependency in Loom for AWS before 1.6.1 allowed remote actors to obtain super-admin authority over the agent control plane, including registering tool servers, reading stored integration credentials, and rewriting the IAM role policies attached to managed agent roles, via any request to the application API in a deployment where no identity provider is configured. To remediate this issue, users should upgrade to version 1.6.1 or later.
Title Missing authentication for critical function in Loom for AWS
Weaknesses CWE-1188
CWE-306
References
Metrics cvssV3_1

{'score': 10, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'}

cvssV4_0

{'score': 10, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: AMZN

Published:

Updated: 2026-10-02T21:09:30.961Z

Reserved: 2026-10-01T14:59:36.204Z

Link: CVE-2026-103956

cve-icon Vulnrichment

Updated: 2026-10-02T21:09:19.921Z

cve-icon NVD

Status : Received

Published: 2026-10-02T19:16:39.750

Modified: 2026-10-02T22:16:53.973

Link: CVE-2026-103956

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-02T20:30:16Z

Weaknesses