Vulnerability in PHP Group
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.
Published .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/php/php-src/security/advisories/GHSA-rgrp-mwpx-f6rm (vendor-advisory)
Frequently asked questions
- What is CVE-2026-91765?
- CVE-2026-91765 is a high-severity vulnerability in PHP Group, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2026-09-25.
- How severe is CVE-2026-91765?
- High severity. CVSS v3 base score is 7.5 out of 10.