CVE-2025-6491

MEDIUM

PHP 8.1.0-8.1.32 - Null Pointer Dereference in SOAP XML Namespace Prefix Parsing

Title source: llm
STIX 2.1

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.

References (3)

Core 3

Scores

CVSS v3 5.9
EPSS 0.0077
EPSS Percentile 73.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-476
Status published
Products (1)
php/php 8.1.0 - 8.1.33
Published Jul 13, 2025
Tracked Since Feb 18, 2026