CVE-2026-92943

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.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://aws.amazon.com/security/security-bulletins/2026-114-aws/
https://github.com/aws/aws-iot-device-sdk-python/releases/tag/v1.6.1
https://github.com/aws/aws-iot-device-sdk-python/security/advisories/GHSA-g7vp-3rxx-v25r
https://pypi.org/project/AWSIoTPythonSDK/1.6.1/

Configurations

No configuration.

History

17 Sep 2026, 20:18

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-17 20:18

Updated : 2026-09-18 17:48

NVD link : CVE-2026-92943

Mitre link : CVE-2026-92943

CVE.ORG link : CVE-2026-92943

JSON object : View

Products Affected

No product.

CWE

CWE-297

Improper Validation of Certificate with Host Mismatch

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