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CVE

CVE-2026-103956

Missing authentication for critical function in Loom for AWS
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CVE

CVE-2026-103956

Missing authentication for critical function in Loom for AWS

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.

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

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
10
-
4.0
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
C
H
U
0
-
C
H
U
-

Related Resources

No items found.

References

https://aws.amazon.com/security/security-bulletins/2026-124-aws/, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103956.json, https://github.com/awslabs/loom/security/advisories/GHSA-vgmj-998f-r8mp, https://nvd.nist.gov/vuln/detail/CVE-2026-103956, https://github.com/awslabs/loom/releases/tag/v1.6.1

Severity

0

CVSS Score
0
10

Basic Information

Base CVSS
0
EPSS Probability
0.02494%
EPSS Percentile
0.84555%
Introduced Version
0
Fix Available
ccad5665d89e659876f7175647b4a2b46e406ddf

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