Vulnerability in AWS Aws-C-Mqtt
CVE-2026-115417
Memory allocation with excessive size value in the MQTT 3.1.1 compatibility adapter in AWS aws-c-mqtt before 0.16.2 might allow a remote actor to cause a denial of service of the client application. To remediate this issue, users should upgrade to aws-c-mqtt 0.16.2 or later, or to an AWS Common Runtime or AWS IoT Device SDK release that bundles it.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- ff89ba41-3aa1-4d27-914a-91399e9639e5 (release-notes, patch)
- ff89ba41-3aa1-4d27-914a-91399e9639e5 (third-party-advisory)
- ff89ba41-3aa1-4d27-914a-91399e9639e5 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-115417?
- CVE-2026-115417 is a high-severity vulnerability in AWS Aws-C-Mqtt, classified under CWE-789. CVSS score: 7.5/10. Published 2026-10-22.
- How severe is CVE-2026-115417?
- High severity. CVSS v3 base score is 7.5 out of 10.