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CVE-2026-7263 — HIGH severity vulnerability | Release Alert

CVE-2026-7263

7.5

HIGHCVSS v3

Published

May 10, 2026

Affected

8 projects

Assigned by

[email protected]

Severity scale

010

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.

GitHubThe PHP Interpreter

NVD

NPM

>= 8.4.0, < 8.4.21, >= 8.5.0, < 8.5.6NVD

NPMLezer-based PHP grammar

More on this CVE

NVD↗GitHub Advisory↗

>= 8.4.0, < 8.4.21, >= 8.5.0, < 8.5.6NVD

lezer-parser/php

GitHubPHP grammar for Lezer.

>= 8.4.0, < 8.4.21, >= 8.5.0, < 8.5.6NVD

Crates.ioRust bindings for the PHP runtime

>= 8.4.0, < 8.4.21, >= 8.5.0, < 8.5.6NVD

NPMAllows you to run PHP code in Node.js in various ways.

>= 8.4.0, < 8.4.21, >= 8.5.0, < 8.5.6NVD

Python Package IndexHandle some of the strange standards in PHP projects

>= 8.4.0, < 8.4.21, >= 8.5.0, < 8.5.6NVD

Docker HubWhile designed for web development, the PHP scripting language also provides general-purpose use.

>= 8.4.0, < 8.4.21, >= 8.5.0, < 8.5.6NVD