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.
References (1)
Core 1
Core References
Vendor Advisory vendor-advisory
https://github.com/php/php-src/security/advisories/GHSA-4jhr-8w89-j733
Scores
CVSS v3
7.5
EPSS
0.0006
EPSS Percentile
17.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-404
CWE-835
Status
published
Products (3)
php/php
8.4.0 - 8.4.21
PHP Group/PHP
8.4.* - 8.4.21
PHP Group/PHP
8.5.* - 8.5.6
Published
May 10, 2026
Tracked Since
May 10, 2026