CVE-2026-92943
Improper validation of certificate with host mismatch in AWS IoT Device SDK for Python
CVSS Score
8.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-297 |
| Vendor | aws |
| Product | awsiotpythonsdk |
| Published | Sep 17, 2026 |
| Last Updated | Sep 17, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
AWS / AWSIoTPythonSDK
1.5.3 ≤ 1.6.0
References
pypi.org: https://pypi.org/project/AWSIoTPythonSDK/1.6.1/ github.com: https://github.com/aws/aws-iot-device-sdk-python/releases/tag/v1.6.1 aws.amazon.com: https://aws.amazon.com/security/security-bulletins/2026-114-aws/ github.com: https://github.com/aws/aws-iot-device-sdk-python/security/advisories/GHSA-g7vp-3rxx-v25r