CVE-2026-89090
An unrecovered panic in the event stream header decoder in Amazon AWS SDK for Go v2 before release-2026-03-23 might allow an unauthenticated remote actor to terminate the consuming application process via a crafted event stream response frame containing a header value type outside the valid range. To remediate this issue, users should upgrade to release-2026-03-23 or later, and patch any forked or derivative code.
- Published Sep 11, 2026
- CVSS 8.2 high
- 0.3% chance of exploitation in the next 30 days (EPSS)
- A fix is available
Affected software
In the news
- CVE-2026-89090 - Denial of service in the event stream header decoder in AWS SDK for Go v2 AWS Security Bulletins ·