PHP project patches two critical remote code flaws
The PHP project released fixes on Wednesday for two flaws, CVE-2026-109618 and CVE-2026-109619, each rated 9.2 on the CVSS v4.0 scale. An attacker could use them to run code on a server and potentially take control.
The US cyber agency CISA said it had not seen anyone exploit the flaws as of publication. Researchers also reported very little activity beyond reconnaissance.
CERT-EU said the flaws could affect every PHP version from 5 onward. It advised organisations to prepare to update quickly. Britain's National Cyber Security Centre gave the same advice and also urged organisations to isolate internet-facing applications.
OpenAI said in a blog that the AI firm Calif found the bug using OpenAI's GPT-5.6 Sol. The security firm Wiz found and reported it independently. OpenAI described a two-month effort involving PHP maintainers, researchers and security providers.
Key facts
- Who
- CERT-EU (said the flaws could affect every PHP version from 5 onward and advised…); National Cyber Security Centre (Britain's agency that advised organisations to prepare to update quickly and…); Calif; Wiz (security firm that independently found and reported the bug)
- What
- The article describes two critical vulnerabilities in PHP, a web programming language it says is used by the majority of the internet, which it says threatened widespread disruption. Only the headline and description were available, so details of the bugs are not established.
- When
- 24 October 2026
- Status
- Reported