CVE-2026-89090

Published Sep 11, 2026

Last updated a month ago

CVSS high 8.2
AWS

Overview

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
ff89ba41-3aa1-4d27-914a-91399e9639e5
NVD status
Awaiting Analysis

Risk scores

CVSS 4.0

Type
Secondary
Base score
8.2
Impact score
-
Exploitability score
-
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Severity
HIGH

CVSS 3.1

Type
Secondary
Base score
5.9
Impact score
3.6
Exploitability score
2.2
Vector string
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Severity
MEDIUM

Weaknesses

ff89ba41-3aa1-4d27-914a-91399e9639e5
CWE-248

Social media

Hype score
Not currently trending

  1. 🚨 CVE-2026-89090 📊 Severity: HIGH (CVSS 8.2) 🎯 BBP Relevance: LOW Remote DoS in AWS SDK for Go v2 event stream header decoder via out-of-range header types. 🔎 Send invalid header type bytes in event stream frames to trigger Go app crashes. https://t.co/Cyc5HnLSM0

    @NewCVEs

    13 Sept 2026

    3 Impressions

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    0 Replies

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References

Sources include official advisories and independent security research.