CVE-2026-7263

High

Description

In PHP versions 8.4.* before 8.4.21 and 8.5.* before 8.5.6, DOMNode::C14N() method may process the XML data incorrectly, causing a circular linked list in the data structure representing the XML document. This may cause subsequent processing of the XML document to enter infinite loop, causing denial of service in the processing application.

SeverityHigh

CVSS7.5

Exploit probability—

Product

Php

PublishedMay 10, 2026

First seenMay 10, 2026

Weakness typeCWE-404CWE-404 CWE-835CWE-835

How to fix

Update

php php8.4.21, 8.5.6 or later

Vendor advisories

github.com/php/php-src/security/advisories/GHSA-4jhr-8w89-j733
access.redhat.com/errata/RHSA-2026:22649

Affected products

Product	Affected versions	Fixed in
php php	8.4.0 ≤ v < 8.4.21, 8.5.0 ≤ v < 8.5.6	8.4.21, 8.5.6

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