How severe is CVE-2026-6735?

CVE-2026-6735 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-6735 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-6735?

CVE-2026-6735 affects Php. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-6735?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-6735 have an EU (EUVD) identifier?

Yes. CVE-2026-6735 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28967.

When was CVE-2026-6735 published?

CVE-2026-6735 was published on 2026-05-10 and last updated on 2026-06-17.

CVE-2026-6735

CVE-2026-6735 is a medium-severity vulnerability in Php with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v4: 7.3
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-28967
Weakness: CWE-79
Affected product: Php
Published: 2026-05-10
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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 JavaScript code (XSS) on the target's machine when the target is viewing the PHP-FPM status page.
How severe is CVE-2026-6735?: CVE-2026-6735 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-6735 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-6735?: CVE-2026-6735 affects Php. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-6735?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-6735 have an EU (EUVD) identifier?: Yes. CVE-2026-6735 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28967.
When was CVE-2026-6735 published?: CVE-2026-6735 was published on 2026-05-10 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:php:php:*:*:*:*:*:*:*:*

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Threat intelligence

Threat-intel indicators referencing this CVE:

117.53.44.117 (ipv4-addr)
41.205.23.59 (ipv4-addr)
192.3.134.24 (ipv4-addr)
95.169.191.176 (ipv4-addr)
69.57.172.96 (ipv4-addr)
45.61.173.86 (ipv4-addr)
82.39.35.211 (ipv4-addr)
39.164.91.67 (ipv4-addr)