What is CVE-2026-55971?

CVE-2026-55971 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Apache Thrift: C++ ZLIB heap buffer overflow (write) in THeaderTransport::untransform()

Which CVE IDs does CVE-2026-55971 cover?

CVE-2026-55971 covers the following CVE IDs: CVE-2026-55971. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-55971?

CVE-2026-55971 has a CVSS v3 base score of 9.8, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-55971?

CVE-2026-55971 affects 1 product, including: azl3 thrift 0.15.0-6 on Azure Linux 3.0.

CVE-2026-55971HighCVSS 9.8

Apache Thrift: C++ ZLIB heap buffer overflow (write) in THeaderTransport::untransform()

Vendor

Microsoft Security Response Center (MSRC)

Published

August 7, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-55971 →

🎯 Affected products1

azl3 thrift 0.15.0-6 on Azure Linux 3.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 0.24.0-1

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55971
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade