CVE-2026-5190

HighCVSS 7.5/10Last modified Oct 20, 2026

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-787

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

Vendor	Product	Versions
AWS	aws-c-event-stream	< 0.6.0

References

Timeline

Published: Mar 31, 2026
Last modified: Oct 20, 2026
NVD status: Awaiting Analysis

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