What is CVE-2026-87866?

CVE-2026-87866 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. wolfSSL public-key pinning bypass

Which CVE IDs does CVE-2026-87866 cover?

CVE-2026-87866 covers the following CVE IDs: CVE-2026-87866. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-87866?

CVE-2026-87866 has a CVSS v3 base score of 7.4, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-87866?

CVE-2026-87866 affects 6 products, including: azl3 cmake 3.30.3-15 on Azure Linux 3.0; azl3 curl 8.11.1-11 on Azure Linux 3.0; azl3 mysql 8.0.46-2 on Azure Linux 3.0; azl3 rust 1.75.0-31 on Azure Linux 3.0; azl3 rust 1.96.1-2 on Azure Linux 3.0; and others — see the full list on the advisory page.

CVE-2026-87866HighCVSS 7.4

wolfSSL public-key pinning bypass

Vendor

Microsoft Security Response Center (MSRC)

Published

October 23, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-87866 →

🎯 Affected products6

azl3 cmake 3.30.3-15 on Azure Linux 3.0
azl3 curl 8.11.1-11 on Azure Linux 3.0
azl3 mysql 8.0.46-2 on Azure Linux 3.0
azl3 rust 1.75.0-31 on Azure Linux 3.0
azl3 rust 1.96.1-2 on Azure Linux 3.0
azl3 tensorflow 2.16.1-11 on Azure Linux 3.0

✅ Remediation

KBRelease Notes (Security Update)

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-87866
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade