CVE-2025-6491CWE-476

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

Medium · published July 13, 2025

CVSS v3.1
5.9
EPSS
1%
Percentile
62.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.9 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00990 · 62.2th percentile
Weakness
CWE-476 · NULL Pointer Dereference
Published
2025-07-13T22:10Z
EPSS history
Timeline
  • 13 JUL 22:10Z
    NULL Pointer Dereference in PHP SOAP Extension via Large XML Namespace Prefix
    cvelistv5