CVE-2026-5190 HIGH

CVE-2026-5190: AWS C Event Stream Streaming Decoder Stack Buffer Overflow

Weakness CWE-787
Published March 31, 2026
Last update April 1, 2026
View on NVD All CVEs

CVSS base score

7.5/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction Required
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 31, 2026 CVE published
April 1, 2026 Record updated