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CVE

CVE-2026-92943

Improper validation of certificate with host mismatch in AWS IoT Device SDK for Python
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CVE

CVE-2026-92943

Improper validation of certificate with host mismatch in AWS IoT Device SDK for Python

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.

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To remediate this issue, users should upgrade to version 1.6.1.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.2
-
4.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
C
H
U
0
-
C
H
U
-

Related Resources

No items found.

References

https://aws.amazon.com/security/security-bulletins/2026-114-aws/, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92943.json, https://github.com/aws/aws-iot-device-sdk-python/security/advisories/GHSA-g7vp-3rxx-v25r, https://nvd.nist.gov/vuln/detail/CVE-2026-92943, https://github.com/aws/aws-iot-device-sdk-python/releases/tag/v1.6.1, https://pypi.org/project/AWSIoTPythonSDK/1.6.1/

Severity

0

CVSS Score
0
10

Basic Information

Base CVSS
0
EPSS Probability
0.00381%
EPSS Percentile
0.3039%
Introduced Version
3865ac9eec6274dac41f37cabd86e896e0e3bdbc
Fix Available
604b999f027a5f85ae32d3480dbf43cc194e6602

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