CVE-2026-89090: high-severity vulnerability in AWS SDK for Go v2
Denial of service in the event stream header decoder in AWS SDK for Go v2
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.2epss 0.3%
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.
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
AWS · AWS SDK for Go v2