What is CVE-2026-57436?

CVE-2026-57436 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. Nokogiri: Possible Use-After-Free when setting `Document#root=` to an invalid node type

Which CVE IDs does CVE-2026-57436 cover?

CVE-2026-57436 covers the following CVE IDs: CVE-2026-57436. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-57436?

CVE-2026-57436 has a CVSS v3 base score of 5.3, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-57436?

CVE-2026-57436 affects 1 product, including: azl3 rubygem-nokogiri 1.15.4-1 on Azure Linux 3.0.

CVE-2026-57436MediumCVSS 5.3

Nokogiri: Possible Use-After-Free when setting `Document#root=` to an invalid node type

Vendor

Microsoft Security Response Center (MSRC)

Published

June 30, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-57436 →

🎯 Affected products1

azl3 rubygem-nokogiri 1.15.4-1 on Azure Linux 3.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 1.19.4-1

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57436
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade