CVE-2026-6735: PHP

Medium severity, CVSS 6.1. EPSS: 0.3% chance of exploitation in the next 30 days.

In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, 8.5.* before 8.5.6, due to improper sanitation of user data, it allows an attacker to compose an URL, which will cause the target to execute arbitrary JavaScript code (XSS) on the target's machine when the target is viewing the PHP-FPM status page.

Affected products

• PHP PHP: from 8.2.0, before 8.2.31 (fixed in 8.2.31); from 8.3.0, before 8.3.31 (fixed in 8.3.31); from 8.4.0, before 8.4.21 (fixed in 8.4.21); from 8.5.0, before 8.5.6 (fixed in 8.5.6)

Published 2026-05-10. Last modified 2026-07-24.