CVE-2026-91765
Published:September 25, 2026
Updated:October 09, 2026
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.
Affected Packages
https://github.com/php/php-src.git (GITHUB):
Affected version(s) >=php-8.4.0alpha1 <php-8.4.26Fix Suggestion:
Update to version php-8.4.26https://github.com/php/php-src.git (GITHUB):
Affected version(s) >=php-8.5.0alpha1 <php-8.5.11Fix Suggestion:
Update to version php-8.5.11https://github.com/php/php-src.git (GITHUB):
Affected version(s) >=php-8.2.0alpha1 <php-8.2.34Fix Suggestion:
Update to version php-8.2.34https://github.com/php/php-src.git (GITHUB):
Affected version(s) >=php-8.3.0alpha1 <php-8.3.35Fix Suggestion:
Update to version php-8.3.35Related Resources (1)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Uncontrolled Recursion
EPSS
Base Score:
0.52