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CVE-2026-92943 Details

Description

Improper validation of certificate with host mismatch in the MQTT client TLS connection layer in AWS IoT Device SDK for Python 1.5.3 through 1.6.0 on Python 3.7 and later might allow an adversary-in-the-middle actor to impersonate the AWS IoT Core endpoint, read device telemetry, and inject arbitrary MQTT messages that the device processes as authentic, via a certificate issued for an unrelated hostname by a certificate authority present in the device trust store. To remediate this issue, users should upgrade to version 1.6.1.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: AMZNCVSS-B:8.1 HIGHVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://aws.amazon.com/security/security-bulletins/2026-114-aws/	AMZN
https://github.com/aws/aws-iot-device-sdk-python/releases/tag/v1.6.1	AMZN
https://github.com/aws/aws-iot-device-sdk-python/security/advisories/GHSA-g7vp-3rxx-v25r	AMZN
https://pypi.org/project/AWSIoTPythonSDK/1.6.1/	AMZN

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-297	Improper Validation of Certificate with Host Mismatch	AMZN

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Sep 17, 2026	New CVE Received	AMZN
Sep 17, 2026	CVE Modified	CISA-ADP