Medium severity · published May 10, 2026
CVE-2026-6735
XSS within PHP-FPM status endpoint
6.1
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 9% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PH
PHP · PHP
8.2.* before 8.2.31; 8.3.* before 8.3.31; 8.4.* before 8.4.21; 8.5.* before 8.5.6 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-6735
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-6735
Exploit
https://github.com/php/php-src/security/advisories/GHSA-7qg2-v9fj-4mwv
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