Unrecovered Panic in AWS SDK-Go v2 Header Decoder
CVE-2026-89090 Published on September 11, 2026
Denial of service in the event stream header decoder in AWS SDK for Go v2
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.
Vulnerability Analysis
CVE-2026-89090 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
Uncaught Exception
An exception is thrown from a function, but it is not caught. When an exception is not caught, it may cause the program to crash or expose sensitive information.
Products Associated with CVE-2026-89090
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Affected Versions
AWS SDK for Go v2:- Before 2026-03-23 is affected.