What is CVE-2026-3099?

CVE-2026-3099 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. Libsoup: libsoup: authentication bypass via digest authentication replay attack

Which CVE IDs does CVE-2026-3099 cover?

CVE-2026-3099 covers the following CVE IDs: CVE-2026-3099. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-3099?

CVE-2026-3099 has a CVSS v3 base score of 5.8, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-3099?

CVE-2026-3099 affects 10 products, including: azl3 libsoup 3.4.4-12 on Azure Linux 3.0; azl3 libsoup 3.4.4-14 on Azure Linux 3.0; azl3 libsoup 3.4.4-15 on Azure Linux 3.0; azl3 libsoup 3.4.4-16 on Azure Linux 3.0; azl3 libsoup 3.4.4-17 on Azure Linux 3.0; and others — see the full list on the advisory page.

CVE-2026-3099MediumCVSS 5.8

Libsoup: libsoup: authentication bypass via digest authentication replay attack

Vendor

Microsoft Security Response Center (MSRC)

Published

May 31, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-3099 →

🎯 Affected products10

azl3 libsoup 3.4.4-12 on Azure Linux 3.0
azl3 libsoup 3.4.4-14 on Azure Linux 3.0
azl3 libsoup 3.4.4-15 on Azure Linux 3.0
azl3 libsoup 3.4.4-16 on Azure Linux 3.0
azl3 libsoup 3.4.4-17 on Azure Linux 3.0
azl3 libsoup 3.4.4-18 on Azure Linux 3.0
cbl2 libsoup 3.0.4-12 on CBL Mariner 2.0
cbl2 libsoup 3.0.4-13
cbl2 libsoup 3.0.4-13 on CBL Mariner 2.0
cbl2 libsoup 3.0.4-13 on CBL-Mariner 2.0

✅ Remediation

KBRelease Notes (Security Update)

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-3099
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade