CVE-2025-6491

PoC —

CVSS 3.1

5.9 medium

EPSS

<1%p60

Published

Jul 13, 2025 (Jul 13, 2025)

Modified

Jun 17, 2026

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.

Vendors: php
Products: php
Weakness: CWE-476
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (1.0%)

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