What is CVE-2026-31789?

CVE-2026-31789 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. Heap Buffer Overflow in Hexadecimal Conversion

Which CVE IDs does CVE-2026-31789 cover?

CVE-2026-31789 covers the following CVE IDs: CVE-2026-31789. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-31789?

CVE-2026-31789 has a CVSS v3 base score of 4.7, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-31789?

CVE-2026-31789 affects 5 products, including: azl3 nodejs24 24.13.0-3 on Azure Linux 3.0; azl3 nodejs24 24.14.1-1 on Azure Linux 3.0; azl3 openssl 3.3.5-4 on Azure Linux 3.0; azl3 qemu 9.1.0-1 on Azure Linux 3.0; azl3 rust 1.90.0-6 on Azure Linux 3.0.

CVE-2026-31789MediumCVSS 4.7

Heap Buffer Overflow in Hexadecimal Conversion

Vendor

Microsoft Security Response Center (MSRC)

Published

June 2, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-31789 →

🎯 Affected products5

azl3 nodejs24 24.13.0-3 on Azure Linux 3.0
azl3 nodejs24 24.14.1-1 on Azure Linux 3.0
azl3 openssl 3.3.5-4 on Azure Linux 3.0
azl3 qemu 9.1.0-1 on Azure Linux 3.0
azl3 rust 1.90.0-6 on Azure Linux 3.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 3.3.5-5

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-31789
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade