VULNERABILITY INTELLIGENCE

CVE-2025-6491

CVSS score5.9 MEDIUM
EPSS probability1.12%
CISA KEVNot currently listed
Published2025-07-13
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

In PHP versions:8.1.* before 8.1.33, 8.2.* before 8.2.29, 8.3.* before 8.3.23, 8.4.* before 8.4.10 when parsing XML data in SOAP extensions, overly large (>2Gb) XML namespace prefix may lead to null pointer dereference. This may lead to crashes and affect the availability of the target server.

Weakness classification

  • security@php.net: CWE-476

Primary references