What is CVE-2026-87864?

CVE-2026-87864 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. IMAP APPEND plus CRLF conversion command injection

Which CVE IDs does CVE-2026-87864 cover?

CVE-2026-87864 covers the following CVE IDs: CVE-2026-87864. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-87864?

CVE-2026-87864 has a CVSS v3 base score of 8.2, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-87864?

CVE-2026-87864 affects 2 products, including: azl3 curl 8.11.1-11 on Azure Linux 3.0; azl3 curl 8.11.1-12 on Azure Linux 3.0.

CVE-2026-87864HighCVSS 8.2

IMAP APPEND plus CRLF conversion command injection

Vendor

Microsoft Security Response Center (MSRC)

Published

October 23, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-87864 →

🎯 Affected products2

azl3 curl 8.11.1-11 on Azure Linux 3.0
azl3 curl 8.11.1-12 on Azure Linux 3.0

✅ Remediation

KBRelease Notes (Security Update)

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-87864
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade