What is CVE-2026-6735?

CVE-2026-6735 is a medium-severity vulnerability in Php, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-05-10.

How severe is CVE-2026-6735?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Php

CVE-2026-6735

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 JavaScrip…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.001 (18.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Php
Php Group — versions 8.2.*, 8.3.*, 8.4.*

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security@php.net (Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2026-6735?: CVE-2026-6735 is a medium-severity vulnerability in Php, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-05-10.
How severe is CVE-2026-6735?: Medium severity. CVSS v3 base score is 6.1 out of 10.