Why is PHP vulnerability trending in Canada?
A series of critical vulnerabilities were discovered in PHP, a language powering roughly 70% of the web. These flaws, uncovered with the help of AI, could allow hackers to take over servers or steal sensitive data, leading many organizations to proactively shut down services for patching.
What happened
- 21 Oct, 2026
PHP releases a patch to fix multiple memory-safety flaws in its core engine [2].
- 22 Oct, 2026
The Canadian government takes several websites offline, including Statistics Canada, as a precaution [3].
- 23 Oct, 2026
The UK government reports that 32 services are unavailable and four are partially unavailable due to security updates [1].
What you need to know
PHP is a foundational language used by WordPress, Wikipedia, and Drupal [1, 2].
The flaws affect nearly every PHP version from the last decade, starting with version 5.4 [2].
Frontier AI models were used to turn these long-standing flaws into practical exploits [2].
Immediate patching is strongly recommended for all affected systems [2].
It is not yet confirmed if any successful breaches have occurred, as experts say the full impact may take months to appear [1].
Background
PHP is a scripting language developed in the early 1990s that runs on web servers to create dynamic pages [1]. Because it is so widely used, a flaw in its core engine can put millions of sites at risk even if the site's own code is secure [2]. Researchers at Wiz Research identified these vulnerabilities, which include unauthenticated remote code execution and memory disclosure [2]. This means attackers could potentially read passwords, API keys, and certificates from a server's memory [2].
Questions people ask
Were Canadian government systems hacked?
The chief information officer stated there is currently no indication that federal information or systems were compromised [3].
What is the risk if a site is not patched?
Attackers could potentially steal sensitive data, deface websites, or take full control of the affected servers [2].
Where this came from
[1] bbc.com
Race to update services' computer systems after cyber-security flaw found
Preview image from bbc.com
[2] wiz.io
PHP2Shell: AI uncovers critical RCE vulnerabilities affecting 70% of the Internet
Preview image from wiz.io
[3] globalnews.ca
‘No indication’ of Canadian data compromised by global PHP issue: officials
Preview image from globalnews.ca
Found through Google Trends and drafted with AI from at least two cited sources. Published automatically after passing our automated checks for sources, wording and safety. It may not have been reviewed by a person yet. Report a correction.