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CVE-2026-6735

XSS within PHP-FPM status endpoint

High7.3EPSS 0.19%
Published
Updated
Reserved
Assigned by
php

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 scores of CVE-2026-6735, by who scored it
Scored byCVSSScoreVector
phpCNA (assigner)4.0High7.3CVSS: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
NVDNVD · Analyzed4.0High7.3CVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:Y/R:X/V:X/RE:L/U:Amber
EPSS (exploitation in 30 days)
0.19% · top 91% of all CVEs (5 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.3.

Weakness

Affected products

  • PHP Group · PHP

    • affected 8.2.* – < 8.2.31
    • affected 8.3.* – < 8.3.31
    • affected 8.4.* – < 8.4.21
    • affected 8.5.* – < 8.5.6

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .