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CVE-2026-6735· NVD / CVE Program· CNA php

XSS within PHP-FPM status endpoint

Noroxi assessment

Priority: Monitor (action score 29/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.30% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No special conditions are required; it is repeatable.
  • Fixed version: PHP Group PHP 8.2.31, 8.3.31, 8.4.21.

Low priority for now. Upgrade to PHP Group PHP 8.2.31, 8.3.31, 8.4.21 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

HighCVSS 7.3 · v4.0—No exploit Fix available
Published
May 10, 2026
Updated
Jul 24, 2026
EPSS
0.3% · 22th percentile

Report tools

JSON

Action score

29

Monitor

Low priority for now.

CVSS
29 / 40 · 7.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · php
7.3
NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-6735

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
phpphp

Using php? Add it to your stack and be the first to know about CVEs like this one. (PHP)

Watch new CVEs for php

When you'll hear from us

  • when a new CVE affecting this product is published
  • when a record in your stack enters KEV or gets exploit code

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every Monday

Limit the impact of XSS

This is a cross-site scripting (XSS) vulnerability. A well-configured Content-Security-Policy doesn't fix it, but greatly reduces its impact. Check your site's CSP and other security headers for free.

Check security headers

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • php php8.2.0 and later · before 8.2.31
  • php php8.3.0 and later · before 8.3.31
  • php php8.4.0 and later · before 8.4.21
  • php php8.5.0 and later · before 8.5.6

Versions reported by the vendor

Affected version ranges reported by the assigning authority (php). Independent of NVD's CPE analysis and usually ahead of it.

  • PHP Group PHP

    • 8.2.* and later · before 8.2.31affected · semver
    • 8.3.* and later · before 8.3.31affected · semver
    • 8.4.* and later · before 8.4.21affected · semver
    • 8.5.* and later · before 8.5.6affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:10phpbefore 8.3.31-1.el10_28.3.31-1.el10_2
AlmaLinux:10php-bcmathbefore 8.3.31-1.el10_28.3.31-1.el10_2
AlmaLinux:10php-clibefore 8.3.31-1.el10_28.3.31-1.el10_2
AlmaLinux:10php-commonbefore 8.3.31-1.el10_28.3.31-1.el10_2
AlmaLinux:10php-dbabefore 8.3.31-1.el10_28.3.31-1.el10_2
AlmaLinux:10php-dbgbefore 8.3.31-1.el10_28.3.31-1.el10_2
AlmaLinux:10php-develbefore 8.3.31-1.el10_28.3.31-1.el10_2
AlmaLinux:10php-embeddedbefore 8.3.31-1.el10_28.3.31-1.el10_2
AlmaLinux:10php-enchantbefore 8.3.31-1.el10_28.3.31-1.el10_2
AlmaLinux:10php-ffibefore 8.3.31-1.el10_28.3.31-1.el10_2
AlmaLinux:10php-fpmbefore 8.3.31-1.el10_28.3.31-1.el10_2
AlmaLinux:10php-gdbefore 8.3.31-1.el10_28.3.31-1.el10_2
AlmaLinux:10php-gmpbefore 8.3.31-1.el10_28.3.31-1.el10_2
AlmaLinux:10php-intlbefore 8.3.31-1.el10_28.3.31-1.el10_2
AlmaLinux:10php-ldapbefore 8.3.31-1.el10_28.3.31-1.el10_2
AlmaLinux:10php-mbstringbefore 8.3.31-1.el10_28.3.31-1.el10_2
AlmaLinux:10php-mysqlndbefore 8.3.31-1.el10_28.3.31-1.el10_2
AlmaLinux:10php-odbcbefore 8.3.31-1.el10_28.3.31-1.el10_2
AlmaLinux:10php-opcachebefore 8.3.31-1.el10_28.3.31-1.el10_2
AlmaLinux:10php-pdobefore 8.3.31-1.el10_28.3.31-1.el10_2
AlmaLinux:10php-pgsqlbefore 8.3.31-1.el10_28.3.31-1.el10_2
AlmaLinux:10php-processbefore 8.3.31-1.el10_28.3.31-1.el10_2
AlmaLinux:10php-snmpbefore 8.3.31-1.el10_28.3.31-1.el10_2
AlmaLinux:10php-soapbefore 8.3.31-1.el10_28.3.31-1.el10_2

+96

Same product

php: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-4577Argument Injection in PHP-CGIKEV
    99Now
  • CVE-2019-11043Underflow in PHP-FPM can lead to RCEKEV
    99Now
  • CVE-2012-1823sapi/cgi/cgi_main.c in PHP before 5.3.12 and 5.4.x before 5.4.2, when configured as a CGI script (aka php-cgi), does not properly handle queKEV
    99Now

Published before and after this one in the same product

  • ← EarlierCVE-2025-14179May 10, 2026 · SQL injection in pdo_firebird via NUL bytes in quoted strings
    29Monitor
  • ← EarlierCVE-2026-6722May 10, 2026 · Use-After-Free in SOAP using Apache map
    38Monitor
  • Later →CVE-2026-7258May 10, 2026 · Out-of-bounds read in urldecode() on NetBSD
    25Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
PHP Group PHP8.2.31Vendor (CNA)
PHP Group PHP8.3.31Vendor (CNA)
PHP Group PHP8.4.21Vendor (CNA)
PHP Group PHP8.5.6Vendor (CNA)
almalinux:apcu-panel5.1.23-1.module_el9.6.0+151+5f31e576 · AlmaLinux:9Package registry (OSV)
almalinux:php8.3.31-2.module_el9.8.0+255+747189f2 · AlmaLinux:9Package registry (OSV)
almalinux:php-bcmath8.3.31-2.module_el9.8.0+255+747189f2 · AlmaLinux:9Package registry (OSV)
almalinux:php-cli8.3.31-2.module_el9.8.0+255+747189f2 · AlmaLinux:9Package registry (OSV)
almalinux:php-common8.3.31-2.module_el9.8.0+255+747189f2 · AlmaLinux:9Package registry (OSV)
almalinux:php-dba8.3.31-2.module_el9.8.0+255+747189f2 · AlmaLinux:9Package registry (OSV)
almalinux:php-dbg8.3.31-2.module_el9.8.0+255+747189f2 · AlmaLinux:9Package registry (OSV)
almalinux:php-devel8.3.31-2.module_el9.8.0+255+747189f2 · AlmaLinux:9Package registry (OSV)
almalinux:php-embedded8.3.31-2.module_el9.8.0+255+747189f2 · AlmaLinux:9Package registry (OSV)
almalinux:php-enchant8.3.31-2.module_el9.8.0+255+747189f2 · AlmaLinux:9Package registry (OSV)
almalinux:php-ffi8.3.31-2.module_el9.8.0+255+747189f2 · AlmaLinux:9Package registry (OSV)
almalinux:php-fpm8.3.31-2.module_el9.8.0+255+747189f2 · AlmaLinux:9Package registry (OSV)
debian:php8.28.2.31-1~deb12u1 · Debian:12Package registry (OSV)
debian:php8.48.4.21-1~deb13u1 · Debian:13Package registry (OSV)
opensuse:php88.5.6-1.1 · openSUSE:TumbleweedPackage registry (OSV)
red hat:apcu-panel0:5.1.23-1.module+el9.6.0+22647+1741ae35 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:php0:8.5.6-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:php-bcmath0:8.3.31-2.module+el9.8.0+24329+a775fb4e · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:php-bcmath0:8.5.6-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:php-bcmath-debuginfo0:8.3.31-2.module+el9.8.0+24329+a775fb4e · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:php-cli0:8.3.31-2.module+el9.8.0+24329+a775fb4e · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:php-cli0:8.5.6-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:php-cli-debuginfo0:8.3.31-2.module+el9.8.0+24329+a775fb4e · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:php-common0:8.3.31-2.module+el9.8.0+24329+a775fb4e · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:php-common0:8.5.6-1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:php-common-debuginfo0:8.3.31-2.module+el9.8.0+24329+a775fb4e · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)

+22

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
P
Scope
P

Weakness class (CWE)

CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSS vector

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/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

nvd-secondary

Root cause

User content is inserted into the page as HTML. The browser interprets the content as code rather than data.

The bug in code

The whole CWE-79 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

ts
commentEl.innerHTML = comment.body;

Fixed

ts
commentEl.textContent = comment.body;

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

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