CVE-2026-89090

Denial of service in the event stream header decoder in AWS SDK for Go v2

Published Sep 11, 2026 CVSS 4.0 · 8.2 High EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Description 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.
Title Denial of service in the event stream header decoder in AWS SDK for Go v2
First Time appeared Aws
Aws aws Sdk For Go V2
Weaknesses CWE-248
CPEs cpe:2.3:a:aws:aws_sdk_for_go_v2:*:*:*:*:*:*:*:*
Vendors & Products Aws
Aws aws Sdk For Go V2
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.2, 'vector': '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'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
AMZN
Published
Updated
Sep 24, 2026, 7:29 PM
Reserved
Sep 10, 2026, 8:14 PM
Status
Awaiting Analysis
Published
Sep 11, 2026, 6:17 PM
Modified
Sep 11, 2026, 8:19 PM
Severity
Moderate
Public date
Sep 11, 2026, 5:03 PM