CVE-2026-92943
Improper validation of certificate with host mismatch in AWS IoT Device SDK for Python
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.
No summary for this CVE yet.
CVSS Vector Breakdown
Exploitability
AV:NAttack VectorNetwork
AC:HAttack ComplexityHigh
PR:NPrivileges RequiredNone
UI:NUser InteractionNone
Scope
S:UScopeUnchanged
Impact
C:HConfidentialityHigh
I:HIntegrityHigh
A:HAvailabilityHigh
Weaknesses
Affected Products
AWS
commercial·US
Exploitability
No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
References
https://aws.amazon.com/security/security-bulletins/2026-114-aws/
aws.amazon.com
https://github.com/aws/aws-iot-device-sdk-python/releases/tag/v1.6.1
github.com
https://github.com/aws/aws-iot-device-sdk-python/security/advisories/GHSA-g7vp-3rxx-v25r
github.com
and 1 more references View all →
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