What is CVE-2026-48959?

CVE-2026-48959 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop in fastForward

Which CVE IDs does CVE-2026-48959 cover?

CVE-2026-48959 covers the following CVE IDs: CVE-2026-48959. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-48959?

CVE-2026-48959 has a CVSS v3 base score of 7.5, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-48959?

CVE-2026-48959 affects 1 product, including: azl3 perl 5.38.2-509 on Azure Linux 3.0.

CVE-2026-48959HighCVSS 7.5

IO::Uncompress::Unzip versions before 2.220 for Perl allow CPU exhaustion via per-byte read loop in fastForward

Vendor

Microsoft Security Response Center (MSRC)

Published

June 2, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-48959 →

🎯 Affected products1

azl3 perl 5.38.2-509 on Azure Linux 3.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 5.38.2-510

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48959
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade