high CVSS 8

CVE-2026-22248·PHP vulnerability

GLPI is an open-source asset and IT management software package that provides ITIL Service Desk features, licenses tracking and software auditing. From 11.0.0 to before 11.0.5, an authenticated technician user can upload a malicious file and trigger its execution through an unsafe PHP instantiation. This vulnerability is fixed in 11.0.5.

Severity
high
Software
PHP
Fixed in
11.0.5
Published
2026-03-11

Affected versions

From: 11.0.0

Until: 11.0.5

Fixed in: 11.0.5

How to fix this CVE

GLPI users running versions 11.0.0 through 11.0.4 must upgrade to version 11.0.5 or later immediately to patch an authenticated file upload vulnerability that permits remote code execution. This flaw allows technicians with legitimate access to upload specially crafted files that can be executed on the server through improper PHP object instantiation. Ensure all instances of GLPI are updated to the fixed release and verify the patch deployment across your infrastructure.

sudo dnf check-update php && sudo dnf upgrade php

Defensia detects this vulnerability

What an exploitation attempt looks like

Sample log line indicative of exploitation attempts:

POST /glpi/(front/document.form.php|plugins/.*/upload) HTTP/1.1.*Content-Disposition.*filename=".*\.(php|phtml|phar|php[3-7]|phps)".*HTTP/1.1 (200|201|204)

WAF mitigation (if patching is not yet possible)

Add this rule to your WAF to block exploitation attempts while you schedule the patch. 

Implement WAF rules to block POST requests to GLPI document upload endpoints (/glpi/front/document.form.php, /glpi/plugins/*/upload) from non-administrative accounts; restrict file uploads to whitelisted MIME types and enforce filename extensions that exclude executable types (.php, .phtml, .phar); log all upload attempts for forensic review.

How to check if you are affected

  1. Step 1: Check GLPI version with `grep -r 'GLPI_VERSION' /path/to/glpi/` or review the GLPI administration interface under Setup > General to locate the installed version number
  2. Step 2: Verify if the vulnerable file upload functionality is accessible by checking if technician-level users can access document or attachment upload modules within GLPI
  3. Step 3: Search application logs at `/var/log/apache2/` or `/var/log/nginx/` for POST requests to file upload endpoints combined with suspicious file extensions or .php files; look for patterns like `POST /plugins/` or `/documents/send.php` with 200/201 responses followed by subsequent GET requests to uploaded file paths
  4. Step 4: Confirm patch deployment by verifying GLPI version displays 11.0.5 or higher in the administration panel and cross-check PHP package version with `php -v` or `dpkg -l | grep php` on Debian/Ubuntu or `rpm -qa | grep php` on RHEL/CentOS

FAQ

What is CVE-2026-22248?

This is a high-severity authenticated file upload vulnerability in GLPI that allows technician-level users to upload malicious files and trigger their execution via unsafe PHP object instantiation, leading to remote code execution on the affected server.

Is CVE-2026-22248 being actively exploited?

No, this vulnerability is not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog and no public exploits have been disclosed, though the attack surface remains significant in organizations with untrusted technician accounts.

What versions of PHP are affected by CVE-2026-22248?

This vulnerability affects GLPI versions 11.0.0 through 11.0.4. It is not a PHP vulnerability itself but rather a flaw in GLPI's file handling that impacts deployments running those specific GLPI releases regardless of the underlying PHP version.

How do I check if my server is vulnerable to CVE-2026-22248?

Log into your GLPI administration panel and navigate to Setup > General to confirm your installed version is between 11.0.0 and 11.0.4; alternatively, run `grep -r 'GLPI_VERSION\|MAJOR.*MINOR.*PATCH' /path/to/glpi/` to extract version metadata from configuration files.

Does Defensia detect CVE-2026-22248?

Yes — Defensia's CVE advisory scanner compares installed GLPI package versions against the NVD database. If GLPI is installed on a monitored server, CVE-2026-22248 will appear in your dashboard with remediation steps and version comparison details.

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References

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