CVE-2026-92943 AWS IoT Device SDK for Python - Man-in-the-Middle

AWS IoT Device SDK for Python 1.5.3 through 1.6.0 on Python 3.7 and later contains a man-in-the-middle vulnerability caused by improper validation of certificates with host mismatch in the MQTT client TLS layer, letting adversaries impersonate AWS IoT Core endpoints and read or inject MQTT messages, exploit requires attacker to be in a man-in-the-middle position.

CVSS base score 8.1 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.38% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Man-in-the-Middle
Impact
Man In The Middle, Information Disclosure, Data Tampering
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
17 September 2026
Updated
15 October 2026
Weakness
CWE-297

Vendor fix

Upgrade to version 1.6.1.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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