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AWS Security BulletinsCVE-2026-89090

CVE-2026-89090 - Denial of service in the event stream header decoder in AWS SDK for Go v2

Bulletin ID: 2026-110-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 09/11/2026 10:00 AM PDT Description: An issue exists in the the EventStream header decoder in AWS SDK for Go v2 in versions predating 2026-03-23. An actor can send a malformed EventStream response frame containing a crafted header value type byte outside the valid range, which can cause the host process to terminate. Impacted versions: < 2026-03-23 Please refer to the article below for the most up-to-date and complete information related to this AWS Security Bulletin.

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CVE-2026-89090View CVSS, KEV, EPSS, and threat context
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