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2 vulnerabilities found for AWSIoTPythonSDK by AWS
CVE-2026-92943 (GCVE-0-2026-92943)
Vulnerability from nvd – Published: 2026-09-17 19:14 – Updated: 2026-09-17 19:57
VLAI
EPSS
VEX
Title
Improper validation of certificate with host mismatch in AWS IoT Device SDK for Python
Summary
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.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 19:56 UTC
CWE
- CWE-297 - Improper validation of certificate with host mismatch
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://pypi.org/project/AWSIoTPythonSDK/1.6.1/ | patchrelease-notes |
| https://github.com/aws/aws-iot-device-sdk-python/… | patchrelease-notes |
| https://aws.amazon.com/security/security-bulletin… | vendor-advisory |
| https://github.com/aws/aws-iot-device-sdk-python/… | release-notes |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| AWS | AWSIoTPythonSDK |
Affected:
1.5.3 , ≤ 1.6.0
(custom)
cpe:2.3:a:aws:awsiotpythonsdk:*:*:*:*:*:*:*:* |
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CVE-2026-92943 (GCVE-0-2026-92943)
Vulnerability from cvelistv5 – Published: 2026-09-17 19:14 – Updated: 2026-09-17 19:57
VLAI
EPSS
VEX
Title
Improper validation of certificate with host mismatch in AWS IoT Device SDK for Python
Summary
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.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 19:56 UTC
CWE
- CWE-297 - Improper validation of certificate with host mismatch
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://pypi.org/project/AWSIoTPythonSDK/1.6.1/ | patchrelease-notes |
| https://github.com/aws/aws-iot-device-sdk-python/… | patchrelease-notes |
| https://aws.amazon.com/security/security-bulletin… | vendor-advisory |
| https://github.com/aws/aws-iot-device-sdk-python/… | release-notes |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| AWS | AWSIoTPythonSDK |
Affected:
1.5.3 , ≤ 1.6.0
(custom)
cpe:2.3:a:aws:awsiotpythonsdk:*:*:*:*:*:*:*:* |
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