What is CVE-2026-78253?

CVE-2026-78253 is a security advisory published by Microsoft Security Response Center (MSRC) with Low severity. Denial-of-service (stack-exhaustion) vulnerability in QXmlStreamReader::readElementText() impacts Qt

Which CVE IDs does CVE-2026-78253 cover?

CVE-2026-78253 covers the following CVE IDs: CVE-2026-78253. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

Which products are affected by CVE-2026-78253?

CVE-2026-78253 affects 1 product, including: azl3 qtbase 6.6.3-6 on Azure Linux 3.0.

CVE-2026-78253Low

Denial-of-service (stack-exhaustion) vulnerability in QXmlStreamReader::readElementText() impacts Qt

Vendor

Microsoft Security Response Center (MSRC)

Published

October 9, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-78253 →

🎯 Affected products1

azl3 qtbase 6.6.3-6 on Azure Linux 3.0

✅ Remediation

KBRelease Notes (Security Update) — fixed build 6.6.3-7

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78253
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade