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Fencer Vulns
medium 5.9

CVE-2026-89090 json

Denial of service in the event stream header decoder in AWS SDK for Go v2

published 2026-04-08 7 mo ago modified 2026-09-24 45 d ago also GHSA-xmrv-pmrh-hhx2 , GO-2026-5764 , EUVD-2026-76157

cvss
5.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 23%
public exploits
0
none known

Summary

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.

Patch / fix

  • go github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream 1.7.8
  • go github.com/aws/aws-sdk-go-v2/service/bedrockagentcore 1.15.2
  • go github.com/aws/aws-sdk-go-v2/service/bedrockagentruntime 1.51.8
  • go github.com/aws/aws-sdk-go-v2/service/bedrockruntime 1.50.4
  • go github.com/aws/aws-sdk-go-v2/service/cloudwatchlogs 1.65.0
  • go github.com/aws/aws-sdk-go-v2/service/iotsitewise 1.52.19
  • go github.com/aws/aws-sdk-go-v2/service/kinesis 1.43.5
  • go github.com/aws/aws-sdk-go-v2/service/lambda 1.88.5
  • go github.com/aws/aws-sdk-go-v2/service/lexruntimev2 1.35.15
  • go github.com/aws/aws-sdk-go-v2/service/s3 1.97.3
  • go github.com/aws/aws-sdk-go-v2/service/sagemakerruntime 1.39.6
  • go github.com/aws/aws-sdk-go-v2/service/transcribestreaming 1.34.5
  • AWS AWS SDK for Go v2 2026-03-23
  • amazon-ecs-init SLES for SAP applications 16.0, SLES 16.0 1.108.0-160000.1.1
  • alloy SLES for SAP applications 16.0, SLES 16.0 1.19.2-160000.1.1
  • alloy SLE Module for Basesystem 15 SP7 1.19.2-150700.15.29.1

suse advisories SUSE-SU-2026:24265-1SUSE-SU-2026:24148-1SUSE-SU-2026:4408-1

  • rqlite openSUSE Leap 16.0 10.6.6-bp160.1.1
  • amazon-cloudwatch-agent openSUSE Tumbleweed 1.300073.0-3.1
  • amazon-ecs-init openSUSE Leap 16.0 1.108.0-160000.1.1
  • rqlite openSUSE Tumbleweed 10.6.1-1.1
  • amazon-ecs-init openSUSE Tumbleweed 1.108.0-1.1
  • alloy openSUSE Leap 16.0 1.19.2-160000.1.1
  • keybase-client openSUSE Leap 16.0 6.6.3-bp160.4.1
  • keybase-client openSUSE Tumbleweed 6.6.3-5.1

opensuse advisories openSUSE-SU-2026:22224-1openSUSE-SU-2026:12208-1openSUSE-SU-2026:22145-1openSUSE-SU-2026:12186-1openSUSE-SU-2026:12107-1openSUSE-SU-2026:22032-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-89090 updated cvss 5.9

github.com/aws/aws-sdk-go-v2: Amazon AWS SDK for Go v2: Denial of Service via crafted event stream header

  • Red Hat AWS Load Balancer Operator albo/aws-load-balancer-rhel8-operator, albo/aws-load-balancer-rhel9-operator
    affected: workaround, no fix available, no fix planned “Upgrade affected AWS SDK for Go v2 modules to the fixed releases published after 2026-03-23. There is no documented workaround.”
  • Red Hat cert-manager Operator for Red Hat OpenShift cert-manager/jetstack-cert-manager-rhel9, cert-manager/jetstack-cert-manager-acmesolver-rhel9 Red Hat Compliance Operator compliance/openshift-compliance-rhel8-operator, compliance/openshift-compliance-operator-bundle Red Hat Confidential Compute Attestation openshift-sandboxed-containers/osc-rhel9-operator, openshift-sandboxed-containers/osc-must-gather-rhel9, openshift-sandboxed-containers/osc-podvm-builder-rhel9, openshift-sandboxed-containers/osc-podvm-payload-rhel9, openshift-sandboxed-containers/osc-cloud-api-adaptor-rhel9 Red Hat Cryostat 4 cryostat/cryostat-storage-rhel9, cryostat/cryostat-grafana-dashboard-rhel9 Red Hat Custom Metric Autoscaler operator for Red Hat Openshift custom-metrics-autoscaler/custom-metrics-autoscaler-rhel9, custom-metrics-autoscaler/custom-metrics-autoscaler-adapter-rhel9, custom-metrics-autoscaler/custom-metrics-autoscaler-rhel9-operator, custom-metrics-autoscaler/custom-metrics-autoscaler-admission-webhooks-rhel9 Red Hat DPU kit for NVIDIA dpu-kit-for-nvidia/must-gather-rhel10, dpu-kit-for-nvidia/dpf-hcp-provisioner-rhel10-operator
    affected: workaround, no fix available “Upgrade affected AWS SDK for Go v2 modules to the fixed releases published after 2026-03-23. There is no documented workaround.”
  • Red Hat Exploit Intelligence exploit-intelligence/agent-client-rhel9, exploit-intelligence-tech-preview/agent-client-rhel9, exploit-intelligence-tech-preview/vulnerability-analysis-rhel9
    affected: workaround, no fix planned “Upgrade affected AWS SDK for Go v2 modules to the fixed releases published after 2026-03-23. There is no documented workaround.”
  • Red Hat External Secrets Operator for Red Hat OpenShift external-secrets-operator/external-secrets-rhel9 Red Hat ExternalDNS Operator edo/external-dns-rhel9-operator Red Hat File Integrity Operator compliance/openshift-file-integrity-rhel8-operator, compliance/openshift-file-integrity-operator-bundle Red Hat Kernel Module Management Operator for Red Hat Openshift kmm/kernel-module-management-must-gather-rhel9
    affected: workaround, no fix available “Upgrade affected AWS SDK for Go v2 modules to the fixed releases published after 2026-03-23. There is no documented workaround.”
  • Red Hat Logging Subsystem for Red Hat OpenShift openshift-logging/logging-loki-rhel9, openshift-logging/cluster-logging-rhel9-operator
    affected: workaround, no fix available, no fix planned “Upgrade affected AWS SDK for Go v2 modules to the fixed releases published after 2026-03-23. There is no documented workaround.”
  • Red Hat Migration Toolkit for Virtualization migration-toolkit-virtualization/mtv-api-rhel9, migration-toolkit-virtualization/mtv-controller-rhel9 Red Hat Multicluster Engine for Kubernetes multicluster-engine/hive-rhel9, multicluster-engine/work-rhel9, multicluster-engine/placement-rhel9, multicluster-engine/must-gather-rhel9, multicluster-engine/registration-rhel9, multicluster-engine/addon-manager-rhel9, +6 more Red Hat Multicluster Global Hub multicluster-globalhub/multicluster-globalhub-grafana-rhel9
    affected: workaround, no fix available “Upgrade affected AWS SDK for Go v2 modules to the fixed releases published after 2026-03-23. There is no documented workaround.”
  • Red Hat OpenShift API for Data Protection oadp/oadp-velero-rhel9, oadp/oadp-rhel9-operator, oadp/oadp-non-admin-rhel9, oadp/oadp-mustgather-rhel9, oadp/oadp-cli-binaries-rhel9, oadp/oadp-velero-plugin-rhel9, +2 more
    affected: workaround, no fix available, no fix planned “Upgrade affected AWS SDK for Go v2 modules to the fixed releases published after 2026-03-23. There is no documented workaround.”
  • Red Hat OpenShift Developer Tools and Services ocp-tools-4/jenkins-rhel9, ocp-tools-4/jenkins-agent-base-rhel9
    affected: workaround, no fix planned “Upgrade affected AWS SDK for Go v2 modules to the fixed releases published after 2026-03-23. There is no documented workaround.”
show 9 more
  • Red Hat OpenShift Lightspeed openshift-lightspeed/lightspeed-agentic-sandbox-rhel9 Red Hat OpenShift Pipelines openshift-pipelines/pipelines-opc-rhel9, openshift-pipelines/pipelines-cache-rhel9, openshift-pipelines-client 1.22.0-11814.el9, openshift-pipelines/pipelines-cli-tkn-rhel8, openshift-pipelines/pipelines-cli-tkn-rhel9, openshift-pipelines/pipelines-resolvers-rhel8, +12 more Red Hat OpenShift Serverless openshift-serverless-1/kn-client-kn-rhel9, openshift-serverless-clients 1.17.0-4.el9, openshift-serverless-1/logic-rhel9-operator, openshift-serverless-1/kn-serving-controller-rhel9, openshift-serverless-1/kn-plugin-event-sender-rhel9, openshift-serverless-1/kn-plugin-func-func-util-rhel9
    affected: workaround, no fix available “Upgrade affected AWS SDK for Go v2 modules to the fixed releases published after 2026-03-23. There is no documented workaround.”
  • Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/subctl-rhel9, rhacm2/thanos-rhel9, rhacm2/volsync-rhel9, rhacm2/prometheus-rhel9, rhacm2/acm-grafana-rhel9, rhacm2/acm-prometheus-rhel9, +16 more
    affected: workaround, no fix available, no fix planned “Upgrade affected AWS SDK for Go v2 modules to the fixed releases published after 2026-03-23. There is no documented workaround.”
  • Red Hat Advanced Cluster Security 4 advanced-cluster-security/rhacs-main-rhel8, advanced-cluster-security/rhacs-main-rhel9, advanced-cluster-security/rhacs-roxctl-rhel8, advanced-cluster-security/rhacs-roxctl-rhel9, advanced-cluster-security/rhacs-rhel8-operator, advanced-cluster-security/rhacs-rhel9-operator, +3 more Red Hat AI Inference Server rhaiis/vllm-cpu-rhel9, rhaiis/vllm-tpu-rhel9 Red Hat Build of Kueue kueue/kueue-must-gather-rhel9
    affected: workaround, no fix available “Upgrade affected AWS SDK for Go v2 modules to the fixed releases published after 2026-03-23. There is no documented workaround.”
  • Red Hat Ceph Storage 5 rhceph/snmp-notifier-rhel8 Red Hat Ceph Storage 6 rhceph/snmp-notifier-rhel9, rhceph/rhceph-6-dashboard-rhel9
    affected: workaround, no fix planned “Upgrade affected AWS SDK for Go v2 modules to the fixed releases published after 2026-03-23. There is no documented workaround.”
  • Red Hat Ceph Storage 7 rhceph/grafana-rhel9, rhceph/snmp-notifier-rhel9 Red Hat Ceph Storage 8 rhceph/grafana-rhel9, rhceph/snmp-notifier-rhel9
    affected: workaround, no fix available “Upgrade affected AWS SDK for Go v2 modules to the fixed releases published after 2026-03-23. There is no documented workaround.”
  • Red Hat Ceph Storage 9 ceph, cephadm, librbd1, librgw2, rbd-nbd, ceph-mib, +20 more
    affected: workaround, no fix available, no fix planned “Upgrade affected AWS SDK for Go v2 modules to the fixed releases published after 2026-03-23. There is no documented workaround.”
  • Red Hat Developer Hub 1 rhdh/rhdh-must-gather-rhel9 Red Hat Edge Manager 1 flightctl 1.2.0-1.el10, rhem/flightctl-api-rhel9, rhem/flightctl-api-rhel10, rhem/flightctl-worker-rhel9, rhem/flightctl-worker-rhel10, rhem/flightctl-db-setup-rhel9, +19 more Red Hat Enterprise Linux 9 butane, ignition, ignition-edge, ignition-grub, image-builder, osbuild-composer, +12 more Red Hat Enterprise Linux 10 butane 0.29.0-1.el10, grafana 12.4.3-2.el10, ignition 2.26.0-4.el10, rhel10/bootc-image-builder, image-builder 81.0.0-1.el10, osbuild-composer 176-1.el10, +2 more
    affected: workaround, no fix available “Upgrade affected AWS SDK for Go v2 modules to the fixed releases published after 2026-03-23. There is no documented workaround.”
  • Red Hat Hardened Images prometheus3.5 3.5.5-0.8.hum1, opentofu1.11 1.11.14-0.1.hum1
    affected: workaround, no fix planned “Upgrade affected AWS SDK for Go v2 modules to the fixed releases published after 2026-03-23. There is no documented workaround.”
  • Red Hat OpenShift AI (RHOAI) rhoai/rhai-cli-rhel9, rhoai/odh-core-bff-rhel9, rhoai/odh-eval-hub-rhel9, rhoai/odh-must-gather-rhel9, rhoai/odh-kserve-agent-rhel9, rhoai/odh-kserve-router-rhel9, +41 more Red Hat OpenShift Cluster Manager CLI ocm-cli-clients/ocm-cli-rhel9 Red Hat OpenShift Container Platform 4 cri-o, butane, openshift-clients, butane 0.29.0-1.el10, butane-redistributable, openshift-kni/commatrix, +61 more Red Hat OpenShift Container Platform 5 openshift-clients, butane 0.29.0-1.el10, openshift-kni/commatrix, openshift5/ose-cli-rhel9, openshift5/cnf-tests-rhel9, openshift5/ose-tests-rhel9, +51 more Red Hat Openshift Data Foundation 4 odf4/cephcsi-rhel9, odf4/odf-cli-rhel9, odf4/mcg-core-rhel9, odf4/ocs-rhel9-operator, odf4/rook-ceph-rhel9-operator, odf4/ocs-metrics-exporter-rhel9
    affected: workaround, no fix available “Upgrade affected AWS SDK for Go v2 modules to the fixed releases published after 2026-03-23. There is no documented workaround.”

15 more affected, 2 more fixed, 1 more not affected in the full advisory

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
58 d ago

Exploit prediction

0.30% chance of exploitation in the next 30 days, higher than 23% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 4.0 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
CNA 4.0 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/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
GitHub 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
go github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream
<1.7.8
1.7.8
go github.com/aws/aws-sdk-go-v2/service/bedrockagentcore
<1.15.2
1.15.2
go github.com/aws/aws-sdk-go-v2/service/bedrockagentruntime
<1.51.8
1.51.8
go github.com/aws/aws-sdk-go-v2/service/bedrockruntime
<1.50.4
1.50.4
go github.com/aws/aws-sdk-go-v2/service/cloudwatchlogs
<1.65.0
1.65.0
go github.com/aws/aws-sdk-go-v2/service/iotsitewise
<1.52.19
1.52.19
go github.com/aws/aws-sdk-go-v2/service/kinesis
<1.43.5
1.43.5
go github.com/aws/aws-sdk-go-v2/service/lambda
<1.88.5
1.88.5
go github.com/aws/aws-sdk-go-v2/service/lexruntimev2
<1.35.15
1.35.15
go github.com/aws/aws-sdk-go-v2/service/s3
<1.97.3
1.97.3
go github.com/aws/aws-sdk-go-v2/service/sagemakerruntime
<1.39.6
1.39.6
go github.com/aws/aws-sdk-go-v2/service/transcribestreaming
<1.34.5
1.34.5

Affected products

  • AWS AWS SDK for Go v2

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.