CVE-2026-91765

cleanup_xml_node() in the SOAP XML parser recurses once per XML nesting level with no depth limit. An unauthenticated attacker can post a SOAP request containing tens of thousands of nested elements to any SoapServer endpoint, exhaust the stack and crash the process. The same unbounded recursion exists in the SOAP value decoder and in the WSDL node search helper.

Score

CVSS 3.1 7.5 High

Status

Analyzed - security@php.net

Published

2026-09-25

Last modified

2026-10-23

Weaknesses

CWE-674

Affected products

• Php (Php)
• Php (Php Group)

References

• https://github.com/php/php-src/security/advisories/GHSA-rgrp-mwpx-f6rm