CVE-2026-5190

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.

CVSS Vector

References

• https://aws.amazon.com/security/security-bulletins/2026-011-aws/
• https://github.com/awslabs/aws-c-event-stream/releases/tag/v0.6.0
• https://github.com/awslabs/aws-c-event-stream/security/advisories/GHSA-xvjw-fjq5-68hf