23 October 2026
Reference: CVE-2026-109619
1. What is being reported?
The vulnerability involves PHP’s handling of certain memory areas during web requests. Sometimes, PHP does not properly clear or reset this memory, which attackers can exploit to execute malicious commands remotely. This type of attack is known as remote code execution (RCE).
2. What this means in plain English
If your website or online service uses PHP, hackers might be able to take control of your system without needing physical access. This could lead to stolen information, website defacement, or your systems being used to attack others.
3. Could this affect a small business?
Small businesses with websites or online tools running PHP could be affected, especially if their software is not up to date. Organisations not using PHP-based services or relying on managed platforms may be less at risk, but should still check with their IT provider.
4. What to do now
- Check if your website or online services use PHP and identify the version in use.
- Apply the latest security updates or patches for PHP immediately.
- If you use a web hosting service, contact them to confirm they have applied the necessary patches.
- Monitor your systems for unusual activity and review access logs for signs of compromise.
5. Ask your IT provider
Has the critical PHP vulnerability CVE-2026-109619 been patched on our systems and web services?
6. Bottom line
Urgently update PHP software to protect your organisation from potentially severe cyberattacks.
Information based on CISA KEV, NVD and reputable security reporting.