---
id: CVE-2026-103956
title: >-
  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 st…
summary: >-
  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 st…
severity: critical
cvss: 10
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-306
  - CWE-1188
vendor: AWS
product: loom
affected:
  - loom < 1.6.1
published: '2026-10-02'
updated: '2026-10-02'
sourceUpdated: '2026-10-02T22:16:53.973'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-103956'
references:
  - url: 'https://aws.amazon.com/security/security-bulletins/2026-124-aws/'
    label: ff89ba41-3aa1-4d27-914a-91399e9639e5
  - url: 'https://github.com/awslabs/loom/releases/tag/v1.6.1'
    label: ff89ba41-3aa1-4d27-914a-91399e9639e5
  - url: 'https://github.com/awslabs/loom/security/advisories/GHSA-vgmj-998f-r8mp'
    label: ff89ba41-3aa1-4d27-914a-91399e9639e5
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-10-02T21:09:00.387235Z'
ingestedAt: '2026-10-02T22:33:09.841Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.