CVE Catalog

CVE-2026-92943

HighCVSS 8.1
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.27%

20th percentile - higher than 20% of all known CVEs

Summary

AWS IoT Device SDK for Python versions 1.5.3 through 1.6.0 on Python 3.7 and later has improper certificate validation with host mismatch in the MQTT client TLS connection layer. An adversary-in-the-middle can impersonate the AWS IoT Core endpoint, read telemetry, and inject arbitrary MQTT messages.

Risk Assessment

An adversary can impersonate the AWS IoT Core endpoint, read device telemetry, and inject arbitrary MQTT messages processed as authentic.

Recommendation

Upgrade AWS IoT Device SDK for Python to version 1.6.1 or later.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS