Connect your agent
AdvisoriesCriticalCheck your lockfilePluginHow it worksPricing Connect your agent

Advisory record · GHSA-xmrv-pmrh-hhx2

Denial of Service due to Panic in AWS SDK for Go v2 SDK EventStream Decoder

CVSS 8.2 HighEPSS 0.0031 · 23rd percentile

Published by the GitHub Advisory Database at 8 Apr 2026, 00:18 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/aws/aws-sdk-go-v2/aws/protocol/eventstreamGo<1.7.81.7.8
github.com/aws/aws-sdk-go-v2/service/bedrockagentcoreGo<1.15.21.15.2
github.com/aws/aws-sdk-go-v2/service/bedrockagentruntimeGo<1.51.81.51.8
github.com/aws/aws-sdk-go-v2/service/bedrockruntimeGo<1.50.41.50.4
github.com/aws/aws-sdk-go-v2/service/cloudwatchlogsGo<1.65.01.65.0
github.com/aws/aws-sdk-go-v2/service/iotsitewiseGo<1.52.191.52.19
github.com/aws/aws-sdk-go-v2/service/kinesisGo<1.43.51.43.5
github.com/aws/aws-sdk-go-v2/service/lambdaGo<1.88.51.88.5
github.com/aws/aws-sdk-go-v2/service/lexruntimev2Go<1.35.151.35.15
github.com/aws/aws-sdk-go-v2/service/s3Go<1.97.31.97.3
github.com/aws/aws-sdk-go-v2/service/sagemakerruntimeGo<1.39.61.39.6
github.com/aws/aws-sdk-go-v2/service/transcribestreamingGo<1.34.51.34.5
Identifiers
GHSA-xmrv-pmrh-hhx2 · CVE-2026-89090 · GO-2026-5764
Weakness (CWE)
CWE-20 · CWE-248
Tags
Published
8 Apr 2026
Updated
12 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Several AWS SDK for Go v2 packages, including the eventstream package and multiple service clients, are affected in versions before the listed fixes; the eventstream package is affected before 1.7.8. An attacker who can send a malformed EventStream response frame with an out-of-range header value type byte can crash the host process, causing denial of service. Upgrade each affected module to the fixed version listed (for example, eventstream to 1.7.8 or s3 to 1.97.3). The source lists no workarounds.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.2 High 4.0 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 CNA (AMZN)
  • CISA KEV Not listed.
  • EPSS 0.0031, the 23rd percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:13 UTC First seen by agentprime
  2. 31 Oct 2026, 14:13 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.