CVE-2026-78661MediumMicrosoft CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U

Microsoft security update for CVE-2026-78661 — azl3

Published
October 31, 2026
Last Modified
—

🔗 CVE IDs covered (1)

CVE-2026-78661 →

📋 Microsoft's advisory

EchelonGraph does not copy Microsoft's advisory page: its FAQ and remediation text are not shown here. Read the advisory on https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78661. This page also shows what EchelonGraph holds for CVE-2026-78661, with the description from its CVE record, which the CVE Numbering Authority that assigned the CVE wrote: for a CVE Microsoft assigned, often in the words of Microsoft's own advisory.

🎯 Affected products31

  • azl3 application-gateway-kubernetes-ingress 1.7.7-6 on Azure Linux 3.0
  • azl3 application-gateway-kubernetes-ingress 1.7.7-7 on Azure Linux 3.0
  • azl3 application-gateway-kubernetes-ingress 1.7.7-8 on Azure Linux 3.0
  • azl3 cert-manager 1.12.15-15 on Azure Linux 3.0
  • azl3 cf-cli 8.7.11-10 on Azure Linux 3.0
  • azl3 cloud-provider-kubevirt 0.5.1-10 on Azure Linux 3.0
  • azl3 cloud-provider-kubevirt 0.5.1-11 on Azure Linux 3.0
  • azl3 cri-tools 1.32.0-10 on Azure Linux 3.0
  • azl3 cri-tools 1.32.0-11 on Azure Linux 3.0
  • azl3 dasel 2.8.1-5 on Azure Linux 3.0
  • azl3 dasel 2.8.1-6 on Azure Linux 3.0
  • azl3 docker-buildx 0.14.0-19 on Azure Linux 3.0
  • azl3 docker-buildx 0.14.0-20 on Azure Linux 3.0
  • azl3 docker-compose 2.27.0-16 on Azure Linux 3.0
  • azl3 docker-compose 2.27.0-17 on Azure Linux 3.0
  • azl3 gh 2.102.0-2 on Azure Linux 3.0
  • azl3 gh 2.102.0-3 on Azure Linux 3.0
  • azl3 influxdb 2.7.5-22 on Azure Linux 3.0
  • azl3 influxdb 2.7.5-23 on Azure Linux 3.0
  • azl3 influxdb 2.7.5-24 on Azure Linux 3.0
  • azl3 kube-vip-cloud-provider 0.0.10-11 on Azure Linux 3.0
  • azl3 kube-vip-cloud-provider 0.0.10-12 on Azure Linux 3.0
  • azl3 kubevirt 1.8.4-4 on Azure Linux 3.0
  • azl3 kubevirt 1.8.4-5 on Azure Linux 3.0
  • azl3 packer 1.9.5-23 on Azure Linux 3.0
  • azl3 packer 1.9.5-24 on Azure Linux 3.0
  • azl3 sriov-network-device-plugin 3.7.0-10 on Azure Linux 3.0
  • azl3 sriov-network-device-plugin 3.7.0-9 on Azure Linux 3.0
  • azl3 telegraf 1.31.0-35 on Azure Linux 3.0
  • azl3 telegraf 1.31.0-36 on Azure Linux 3.0
  • +1 more not shown

✅ Updates Microsoft lists: 13 updates

13 rows: one per KB article or update, update type and fixed build. Their details are on Microsoft's advisory.

KB articleUpdateFixed build
—Security Update1.7.7-8
—Security Update—
—Security Update1.31.0-37
—Security Update0.5.1-11
—Security Update1.32.0-11
—Security Update0.14.0-20
—Security Update2.27.0-17
—Security Update2.102.0-3
—Security Update0.0.10-12
—Security Update1.8.4-5
—Security Update3.7.0-10
—Security Update2.8.1-6
—Security Update1.31.0-38

🧭 EchelonGraph on CVE-2026-78661

EchelonGraph score
7.5 HIGH
CISA KEV
Not listed
Fix status
A fix is available — apply it.

Description from the CVE record (CVE.org), as published by its numbering authority

When coalescing adjacent text nodes in addText and fosterParent, appending to an existing TextNode's Data via string concatenation (n.Data += text) reallocated and copied the accumulated string on every token. Inputs containing many short text runs separated by ignored end tags (such as "a</x>") caused O(n^2) allocations and byte copies. Accumulate coalesced text in per-node byte slices during parsing and materialize Data strings once at the end of parse.

Published by Go Project, the CVE Numbering Authority that assigned CVE-2026-78661, in its CVE record at CVE.org; reused under the CVE Program's Terms of Use (its licence and MITRE's copyright notice are in our Terms of Service).

🔗 References (2)