# CVE-2026-89090

## Summary

- **CVE ID:** CVE-2026-89090
- **Severity:** HIGH
- **CVSS Score:** 8.2 (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)
- **CWE:** CWE-248
- **Published:** Sep 11, 2026
- **Last Modified:** Sep 11, 2026

## 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 Products

- AWS — AWS SDK for Go v2 (0)

## References

- [CNA](https://github.com/aws/aws-sdk-go-v2/security/advisories/GHSA-xmrv-pmrh-hhx2)
- [CNA](https://github.com/aws/aws-sdk-go-v2/releases/tag/release-2026-03-23)
- [CNA](https://aws.amazon.com/security/security-bulletins/2026-110-aws/)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.31%
- **EPSS Percentile:** 23.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._