CVE-2026-89090 - 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.
AI Analysis
Technical Summary
CVE-2026-89090 describes a denial of service vulnerability in the EventStream header decoder component of AWS SDK for Go v2. Versions before 2026-03-23 are affected. The vulnerability arises when a crafted EventStream response frame contains a header value type byte outside the valid range, which triggers a termination of the host process. The issue is resolved in version 2026-03-23 and above.
Potential Impact
An attacker can cause the host process using the vulnerable AWS SDK for Go v2 to terminate unexpectedly by sending a malformed EventStream response frame. This results in a denial of service condition affecting availability of the application or service relying on the SDK.
Mitigation Recommendations
Upgrade to AWS SDK for Go v2 version 2026-03-23 or later, where this issue is fixed. There are no applicable workarounds. Ensure any forked or derivative code is also updated to incorporate the fix.
CVE-2026-89090 - Denial of service in the event stream header decoder in AWS SDK for Go v2
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.
Affected software
pkg:golang/github.com/aws/aws-sdk-go-v2Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-89090 describes a denial of service vulnerability in the EventStream header decoder component of AWS SDK for Go v2. Versions before 2026-03-23 are affected. The vulnerability arises when a crafted EventStream response frame contains a header value type byte outside the valid range, which triggers a termination of the host process. The issue is resolved in version 2026-03-23 and above.
Potential Impact
An attacker can cause the host process using the vulnerable AWS SDK for Go v2 to terminate unexpectedly by sending a malformed EventStream response frame. This results in a denial of service condition affecting availability of the application or service relying on the SDK.
Mitigation Recommendations
Upgrade to AWS SDK for Go v2 version 2026-03-23 or later, where this issue is fixed. There are no applicable workarounds. Ensure any forked or derivative code is also updated to incorporate the fix.
Technical Details
- Classification
- {"confidence":0.88,"severitySource":"heuristic","classifier":"rss-v2"}
- Article Source
- {"url":"https://aws.amazon.com/security/security-bulletins/rss/2026-110-aws/","fetched":true,"fetchedAt":"2026-09-11T17:14:28.178Z","wordCount":133}
Threat ID: 6aa436f491cc7f38486f4b53
Added to database: 09/11/2026, 17:14:28 UTC
Last enriched: 09/11/2026, 17:14:33 UTC
Last updated: 09/11/2026, 17:32:58 UTC
Views: 4
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