CVE-2026-6735

XSS within PHP-FPM status endpoint

State: Published
Severity: 7.3 High
Published: May 10, 2026
Updated: May 11, 2026
Reserved: Apr 21, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	7.3 High	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:P/S:P/AU:Y/RE:L/U:Amber	php

Weaknesses

CWE-79 Improper neutralization of input during web page generation ('cross-site scripting')

Affected Products

Product	Versions
PHPPHP Group	8.2.* to before 8.2.31Affected 8.3.* to before 8.3.31Affected 8.4.* to before 8.4.21Affected 8.5.* to before 8.5.6Affected

References

https://github.com/php/php-src/security/advisories/GHSA-7qg2-v9fj-4mwv

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