CVEs-PoC/2025/CVE-2025-6491.md

CVE-2025-6491

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.

POC

Reference

• https://github.com/php/php-src/security/advisories/GHSA-453j-q27h-5p8x

Github

• https://github.com/Lekssays/Lekssays
• https://github.com/w4zu/Debian_security