UpHeron
All vulnerabilities

Servers and applications

CVE-2025-6491

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.

Severity
Medium 5.9
Published
13 Jul 2025
Last changed
17 Jun 2026
Added to UpHeron
14 Oct 2026
Fixed in
8.1.33, 8.2.29, 8.3.23, 8.4.10
Sources
NVD

Affected software

SoftwareAffected versions
PHPServers and applications · cpe:a:php:php
  • From 8.1.0 before 8.1.33
  • From 8.2.0 before 8.2.29
  • From 8.3.0 before 8.3.23
  • From 8.4.0 before 8.4.10

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2025-6491
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2025-6491