CVE-2026-5190

Public on 2026-03-31
Modified on 2026-10-22
Description
Out-of-bounds write in the streaming decoder component in aws-c-event-stream before 0.6.0 might allow a third party operating a server to cause memory corruption leading to arbitrary code execution on a client application that processes crafted event-stream messages.



To remediate this issue, users should upgrade to version 0.6.0 or later.
Severity
Important severity
Important
See what this means
CVSS v3 Base Score
8.1
See breakdown

Affected Packages

Platform Package Release Date Advisory Status
Amazon Linux 2023 python-awscrt 2026-10-22 ALAS2023-2026-3280 Fixed
Amazon Linux 2027 Preview python-awscrt Not Affected

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H