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CVE-2026-78663CriticalRevised 12 Oct

Double flow control refund on HTTP/2 server streams in net/http

MSRC advisory NVD CVE.org

Assessment

Severity
Critical
CVSS base score
9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Impact
Not stated
EPSS, next 30 days
Not scored yet
Public exploit code
No Nuclei template lists it
Exploitability
Not assessed
Publicly disclosed
No
Customer action
Required: apply the update
Component
Mariner
Weakness
CWE-675: Multiple Operations on Resource in Single-Operation Context
Issued by
Go
Published
11 Oct 2026 · October 2026
Last revised
12 Oct 2026Information published.

Updates that fix it

0 KBs

No KB listed

MSRC lists no downloadable update, which usually means a service-side fix or a release-notes update. Check the MSRC advisory.

Affected products

31 affected products
  • azl3 azurelinux-image-tools 1.6.0-3 on Azure Linux 3.0
  • azl3 cert-manager 1.12.15-14 on Azure Linux 3.0
  • azl3 cf-cli 8.7.11-9 on Azure Linux 3.0
  • azl3 cloud-provider-kubevirt 0.5.1-9 on Azure Linux 3.0
  • azl3 containerd2 2.3.4-1 on Azure Linux 3.0
  • azl3 containerized-data-importer 1.62.0-8 on Azure Linux 3.0
  • azl3 coredns 1.11.4-21 on Azure Linux 3.0
  • azl3 cri-tools 1.32.0-8 on Azure Linux 3.0
  • azl3 docker-buildx 0.14.0-17 on Azure Linux 3.0
  • azl3 docker-cli 25.0.7-5 on Azure Linux 3.0
  • azl3 docker-compose 2.27.0-14 on Azure Linux 3.0
  • azl3 etcd 3.5.33-1 on Azure Linux 3.0
  • azl3 flannel 0.24.2-32 on Azure Linux 3.0
  • azl3 httpd 2.4.68-1 on Azure Linux 3.0
  • azl3 ignition-flatcar 2.22.0-6 on Azure Linux 3.0
  • azl3 influxdb 2.7.5-21 on Azure Linux 3.0
  • azl3 kata-containers 4.1.0.kata0-1 on Azure Linux 3.0
  • azl3 kata-containers-cc 3.15.0.aks0-21 on Azure Linux 3.0
  • azl3 keda 2.14.1-19 on Azure Linux 3.0
  • azl3 kube-vip-cloud-provider 0.0.10-10 on Azure Linux 3.0
  • azl3 kubernetes 1.30.10-30 on Azure Linux 3.0
  • azl3 kubevirt 1.8.4-2 on Azure Linux 3.0
  • azl3 libcontainers-common 20240213-3 on Azure Linux 3.0
  • azl3 moby-containerd-cc 1.7.7-17 on Azure Linux 3.0
  • azl3 moby-engine 25.0.3-20 on Azure Linux 3.0
  • azl3 multus 4.0.2-11 on Azure Linux 3.0
  • azl3 opa 0.63.0-5 on Azure Linux 3.0
  • azl3 packer 1.9.5-21 on Azure Linux 3.0
  • azl3 prometheus-adapter 0.12.0-10 on Azure Linux 3.0
  • azl3 skopeo 1.14.4-13 on Azure Linux 3.0
  • azl3 telegraf 1.31.0-33 on Azure Linux 3.0

What changed

First observed 14 Oct 2026
  1. 14 Oct 2026 Source coverage: msrc-cvrfIncomplete → Current

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Cite this recorded revision to keep the same title, summary, facts and links when the page changes.

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ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 14 Oct 11:21 UTC · 251 of 253 readable · 250 fully read · documentation 0/409 current

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