CVE Alert: CVE-2025-6491

Vulnerability Summary: 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.

Affected Endpoints:

No affected endpoints listed.

Published Date:

7/13/2025, 10:15:23 PM

⚠️ CVSS Score:

Exploit Status:

Not Exploited

References:

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

Recommended Action:

No proposed action available. Please refer to vendor documentation for updates.

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