What is CVE-2026-78661?

CVE-2026-78661 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Avoid quadratic complexity when coalescing text nodes in html in golang.org/x/net

Which CVE IDs does CVE-2026-78661 cover?

CVE-2026-78661 covers the following CVE IDs: CVE-2026-78661. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-78661?

CVE-2026-78661 has a CVSS v3 base score of 7.5, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-78661?

CVE-2026-78661 affects 8 products, including: azl3 cni-plugins 1.4.0-6 on Azure Linux 3.0; azl3 containerized-data-importer 1.62.0-9 on Azure Linux 3.0; azl3 cri-tools 1.32.0-10 on Azure Linux 3.0; azl3 kubernetes 1.30.10-32 on Azure Linux 3.0; azl3 libcontainers-common 20240213-3 on Azure Linux 3.0; and others — see the full list on the advisory page.

CVE-2026-78661HighCVSS 7.5

Avoid quadratic complexity when coalescing text nodes in html in golang.org/x/net

Vendor

Microsoft Security Response Center (MSRC)

Published

October 31, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-78661 →

🎯 Affected products8

azl3 cni-plugins 1.4.0-6 on Azure Linux 3.0
azl3 containerized-data-importer 1.62.0-9 on Azure Linux 3.0
azl3 cri-tools 1.32.0-10 on Azure Linux 3.0
azl3 kubernetes 1.30.10-32 on Azure Linux 3.0
azl3 libcontainers-common 20240213-3 on Azure Linux 3.0
azl3 multus 4.0.2-12 on Azure Linux 3.0
azl3 nvidia-container-toolkit 1.17.8-4 on Azure Linux 3.0
azl3 prometheus-adapter 0.12.0-12 on Azure Linux 3.0

✅ Remediation

KBRelease Notes (Security Update)

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78661
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade