PT-2026-29320 · Aws · Aws-C-Event-Stream

Published 2026-03-31 · Updated 2026-03-31 · CVE-2026-5190

Mitre

CVSS v3.1

7.5

High

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

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.

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2026-5190

Affected Products

Aws-C-Event-Stream

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-5190 · Security Note
• https://github.com/awslabs/aws-c-event-stream/releases/tag/v0.6.0 · Patch
• https://aws.amazon.com/security/security-bulletins/2026-011-aws · Vendor Advisory
• https://github.com/awslabs/aws-c-event-stream/security/advisories/GHSA-xvjw-fjq5-68hf · Note