---
title: "CVE-2026-92943: AWS IoT Device SDK for Python - Man-in-the-Middle"
description: "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."
url: https://panop.io/threat-heartbeat/CVE-2026-92943/
---

# 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 ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-92943)

## 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](https://cwe.mitre.org/data/definitions/297.html)

## 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

- [https://nvd.nist.gov/vuln/detail/CVE-2026-92943](https://nvd.nist.gov/vuln/detail/CVE-2026-92943)
- [https://aws.amazon.com/security/security-bulletins/2026-114-aws/](https://aws.amazon.com/security/security-bulletins/2026-114-aws/)
- [https://github.com/aws/aws-iot-device-sdk-python/releases/tag/v1.6.1](https://github.com/aws/aws-iot-device-sdk-python/releases/tag/v1.6.1)
- [https://github.com/aws/aws-iot-device-sdk-python/security/advisories/GHSA-g7vp-3rxx-v25r](https://github.com/aws/aws-iot-device-sdk-python/security/advisories/GHSA-g7vp-3rxx-v25r)
- [https://pypi.org/project/AWSIoTPythonSDK/1.6.1/](https://pypi.org/project/AWSIoTPythonSDK/1.6.1/)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)