CVE-2026-103956CWE-1188CWE-306

CVE-2026-103956

Critical · published October 2, 2026

CVSS v3.1
10.0
EPSS
0%
Percentile
39.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
10.0 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
10.0 · 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
EPSS
0.00468 · 39.5th percentile
Weaknesses
CWE-1188 · Initialization of a Resource with an Insecure Default; CWE-306 · Missing Authentication for Critical Function
Published
2026-10-02T23:16Z
References (3)
EPSS history
Timeline
  • 04 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 02 OCT 19:06Z
    Missing authentication for critical function in Loom for AWS
    cvelistv5