Vulnerability · CVE-2026-92943
CVE-2026-92943 - Improper validation of certificate with host mismatch in AWS IoT Device SDK for Python
Published Sep 17, 2026 · Amazon Web Services
Last checked Oct 26, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2026-92943. EPSS is 0.38%. Act only if a listed version of Amazon Web Services is installed.
Gaps on this record
- No version range is stored. A customer cannot check an installed version against this record.
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- Unknown—
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.38%
- Remediation
- Not established
- Affected products
- Amazon Web Services
Bulletin ID: 2026-115-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 09/17/2026 12:00 PM PDT Description: AWS IoT Device SDK for Python (AWSIoTPythonSDK) is an open source SDK that lets IoT devices and gateways connect to AWS IoT Core over MQTT. We identified CVE-2026-92943 in the MQTT client TLS connection layer, where the client did not validate that the server certificate matched the AWS IoT Core endpoint hostname. On Python 3.7 and later, an adversary-in-the-middle positioned on the network could
No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.
How to fix CVE-2026-92943
No stored fix
No vendor fix text is stored. Use the linked advisory before you change production.
Version check
No version range is stored, so an installed version cannot be checked on this page.
Advisory
Open the aws record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2026-92943. EPSS is 0.38%. Act only if a listed version of Amazon Web Services is installed.
Which versions are affected?
Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 0.38%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Sep 17, 2026 · AWS Security Bulletins
Detected
Bulletin ID: 2026-115-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 09/17/2026 12:00 PM PDT Description: AWS IoT Device SDK for Python (AWSIoTPythonSDK) is an open source SDK that lets IoT devices and gateways connect to AWS IoT Core over MQTT. We identified CVE-2026-92943 in the MQTT client TLS connection layer, where the client did not validate that the server cer
Sources
- AWS Security BulletinsVendor advisoryCVE-2026-92943
Bulletin ID: 2026-115-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 09/17/2026 12:00 PM PDT Description: AWS IoT Device SDK for Python (AWSIoTPythonSDK) is an open source SDK that lets IoT devices and gateways connect to AWS IoT Core over MQTT. We
aws.amazon.com - CVE.orgVulnerability recordCVE-2026-92943
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-92943
30-day exploitation probability 0.38%
first.org
Freshness
Last verified in this catalog Oct 26, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- AWS Security BulletinsOct 23, 2026
- CVE.orgOct 23, 2026
- FIRST EPSSOct 23, 2026