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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/openai/php2shell-checker --skill phpcheck-server- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads phpcheck-server automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Check PHP2Shell patch status
Check for fixes covering both CVE-2026-109618 and CVE-2026-109619. Do not run exploit probes.
Identify the serving installation
Identify the PHP installation serving the site, including its container if applicable. The default CLI PHP may differ from PHP-FPM or Apache's PHP module.
Inspect the serving binary or Apache module and its owning package directly. Determine the OS release and package provider before choosing an advisory.
Check patch status
Compare the full package revision against vendor guidance covering both CVEs. An older upstream version alone does not prove vulnerability. Configuration settings alone do not establish patch status.
The fixed package versions below were verified on 2026-10-22. They apply only to official packages for the listed OS release and PHP branch. Use the listed version or a later version from the same vendor release and stream.
Debian
Use dpkg-query to read the full installed package version and
dpkg --compare-versions for comparisons. Match the Debian release to its
records for CVE-2026-109618
and CVE-2026-109619.
| Debian release and PHP package | Fixed version | Advisory |
|---|---|---|
12 (bookworm), php8.2 | 8.2.35-1~deb12u1 | DLA-4848-1 |
13 (trixie), php8.4 | 8.4.27-1~deb13u1 | DSA-6574-1 |
These are source package versions. Check the serving binary's package, such
as php8.2-fpm or libapache2-mod-php8.2, against the corresponding source.
Ubuntu
Use dpkg-query to read the full installed package version and
dpkg --compare-versions for comparisons. Match the Ubuntu release and PHP
package to the advisory below.
| Ubuntu release and PHP package | Fixed version | Advisory |
|---|---|---|
26.10, php8.5 | 8.5.9-0ubuntu2.1 | USN-8948-1 |
26.04 LTS, php8.5 | 8.5.4-0ubuntu1.5 | USN-8948-1 |
24.04 LTS, php8.3 | 8.3.6-0ubuntu0.24.04.13 | USN-8948-1 |
22.04 LTS, php8.1 | 8.1.2-1ubuntu2.28 | USN-8948-1 |
20.04 LTS, php7.4 (Ubuntu Pro) | 7.4.3-4ubuntu2.29+esm5 | USN-8948-2 |
18.04 LTS, php7.2 (Ubuntu Pro) | 7.2.24-0ubuntu0.18.04.17+esm14 | USN-8948-2 |
16.04 LTS, php7.0 (Ubuntu Pro + Legacy Support) | 7.0.33-0ubuntu0.16.04.16+esm22 | USN-8948-2 |
14.04 LTS, php5 (Ubuntu Pro + Legacy Support) | 5.5.9+dfsg-1ubuntu4.29+esm18 | USN-8948-2 |
Check the package serving the site, such as php8.3-fpm or
libapache2-mod-php8.3, rather than relying on the php metapackage.
RHEL
Use rpm -qf on the serving binary or Apache module to identify its
owning package. Read its full version and vendor with:
rpm -q --queryformat '%{NAME} %{EPOCHNUM}:%{VERSION}-%{RELEASE}.%{ARCH} %{VENDOR}\n' PACKAGE
Match the RHEL major/minor release and PHP module stream to the Red Hat
advisory. Use dnf module list php --enabled where module streams apply.
Known backports covering both CVEs include:
| RHEL release and PHP stream | Fixed version-release | Advisory |
|---|---|---|
| RHEL 8.10, PHP 7.4 | 7.4.33-8.module+el8.10.0+25117+30337cca | RHSA-2026:87080 |
| RHEL 9.8, PHP 8.0 | 8.0.30-8.el9_8.1 | RHSA-2026:87151 |
Use RPM version ordering, including the epoch, within the matching release and stream. For other RHEL streams, consult Red Hat's records for CVE-2026-109618 and CVE-2026-109619.
Upstream and other builds
For other providers, use their own advisories. Do not apply Debian, Ubuntu or RHEL thresholds to another vendor's packages or custom builds.
The upstream fixed releases are 8.2.35, 8.3.36, 8.4.27 and 8.5.12. Older branches may have vendor or source backports.
Verify the running site and report
A fixed installed package does not prove that web workers use it. Confirm the serving installation and whether workers restarted after the update. If that cannot be established, report the running site's patch status as unknown.
Report the package and version checked, the advisory and any required update. Describe packages below the vendor fix as potentially vulnerable. If package or build evidence is unavailable, or the provider or applicable advisory cannot be established, report unknown.
FAQ
What does the phpcheck-server skill do?
Check PHP2Shell patch status with local or server access.
How do I install phpcheck-server?
Run npx skills add https://github.com/openai/php2shell-checker --skill phpcheck-server in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/phpcheck-server/ (personal) or .claude/skills/phpcheck-server/ (project).
Which AI agents can use phpcheck-server?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is phpcheck-server safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains phpcheck-server?
It is published by openai in openai/php2shell-checker. It has 52 recorded installs.
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