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

Quick assessment

Affected
AWS AWS SDK for Go v2
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Amazon AWS SDK for Go v2是美国Amazon公司的一款面向Go语言的云服务开发工具包。 Amazon AWS SDK for Go v2 release-2026-03-23之前版本存在异常处理不当漏洞，该漏洞源于事件流标头解码器中的未恢复panic，可能导致未经身份验证的远程攻击者通过包含超出有效范围标头值类型的特制事件流响应帧终止消费应用程序进程。

CVSS 5.9 · Medium EPSS 0.30% · P23

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
AWS AWS SDK for Go v2 < 2026-03-23 affected
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I. Basic Information for CVE-2026-89090

Vulnerability Information
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Vulnerability Title
Denial of service in the event stream header decoder in AWS SDK for Go v2
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未捕获的异常
Source: CVE Program / CVE List V5
Vulnerability Title
Amazon AWS SDK for Go v2 异常处理不当漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Amazon AWS SDK for Go v2是美国Amazon公司的一款面向Go语言的云服务开发工具包。 Amazon AWS SDK for Go v2 release-2026-03-23之前版本存在异常处理不当漏洞，该漏洞源于事件流标头解码器中的未恢复panic，可能导致未经身份验证的远程攻击者通过包含超出有效范围标头值类型的特制事件流响应帧终止消费应用程序进程。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
AWS AWS SDK for Go v2 0 ~ 2026-03-23 -

II. Public POCs for CVE-2026-89090

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III. Intelligence Information for CVE-2026-89090

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Vendor Advisories for CVE-2026-89090 (2)

Same Patch Batch · AWS · 2026-09-11 · 5 CVEs total

CVE-2026-89066 7.8 HIGH OS command injection in the task synthesis component in projen
CVE-2026-89065 7.1 HIGH Relative path traversal in the generated file manifest cleanup component in projen
CVE-2026-18061 5.9 MEDIUM Improper Restriction of XML External Entity References in AWS Advanced JDBC Wrapper Remote
CVE-2026-89332 5.5 MEDIUM Kiro IDE Sensitive Workspace Data Exfiltration via Agent-Written Workspace Configuration

IV. Related Vulnerabilities

Same vendor: AWS
Same weakness: CWE-248