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.
在 2026-03-23 之前版本的 Amazon AWS SDK for Go v2 中，事件流（event stream）头部解码器中存在一个未恢复的 panic（panic），可能导致未经身份验证的远程攻击者通过构造一个包含超出有效范围的头部值类型的事件流响应帧，从而终止正在消费事件流的应用进程。 要修复此问题，用户应升级到 2026-03-23 或更高版本，并修补任何分叉或衍生代码。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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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
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
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-89090 (2)
Same Patch Batch · AWS · 2026-09-11 · 4 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 |
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V. Comments for CVE-2026-89090
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