CVE-2025-6491

NULL Pointer Dereference in PHP SOAP Extension via Large XML Namespace Prefix

State: Published
Severity: 5.9 Medium
Published: Jul 13, 2025
Updated: Nov 4, 2025
Reserved: Jun 22, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	5.9 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H	php

Weaknesses

CWE-476 NULL Pointer Dereference

Affected Products

Product	Versions
PHPPHP Group	8.1.* to before 8.1.33Affected 8.2.* to before 8.2.29Affected 8.3.* to before 8.3.23Affected 8.4.* to before 8.4.10Affected

References

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