High7.5Red Hat Linux

High [CVE-2026-7263] denial of service via DOMNode::C14N()

This high-severity Red Hat Linux advisory covers CVE-2026-7263 affecting Red Hat Enterprise Linux 10.

CVE-2026-7263 Published May 10, 2026

CVE-2026-7263

Affected products & platforms

Red Hat LinuxUnclassified

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Summary

denial of service via DOMNode::C14N(). Red Hat rates this important (CVSS 7.5).

Weakness: CWE-835. Affected package(s): php8.4.

Resolved in Red Hat advisory RHSA-2026:22649 — update the affected packages (`sudo dnf update`).

Affected product named by the advisory: Red Hat Enterprise Linux 10.

Affected versions

php8.4-0:8.4.21-1.el10_2

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

RHSA-2026:22649

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Update the affected package(s) to the fixed version shipped in RHSA-2026:22649 (`sudo dnf update` / `yum update`).

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

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