CISA strongly urges organizations to immediately patch the recently disclosed critical vulnerabilities in PHP, CVE-2026-109618 and CVE-2026-109619. These vulnerabilities, known as “php2shell,” allow for unauthenticated remote code execution in PHP and affect all PHP installations serving web requests. Organizations should immediately update to PHP 8.5.12, 8.4.27, 8.3.36, or 8.2.35 to fix these vulnerabilities.
Critical Vulnerabilities in PHP Require Immediate Patching
About this summary. This is a short excerpt from the description that CISA published with its article. Cyber Security News did not report or verify the underlying story. Read the original: https://www.cisa.gov/news-events/alerts/2026/10/21/critical-vulnerabilities-php-require-immediate-patching
Source attribution: headline and facts are from CISA (cisa.gov). Summary method: excerpt of the source description. See our source attribution policy.
Related coverage
Introducing the Cloudflare PHP Capture the Flag challenge
Last week was one for the Internet security history books. First, eight eMudhra intermediate certificates were compromised, creating the possibility of forged…
Why It’s Urgent to Update PHP on Your WordPress Site: Two Critical PHP Vulnerabilities and What Our Testing Found
On October 21, 2026, the PHP project released emergency updates for two critical vulnerabilities that can allow an unauthenticated attacker to run code through the PHP…
Cloudflare deploys protections against php2shell vulnerability
Today, Calif.io, Wiz, OpenAI and Quarkslab disclosed two vulnerabilities in PHP, tracked as CVE-2026-109618 and CVE-2026-109619 and known as php2shell. The…
php2shell in Practice: Exploitable, Conditional, and Hard to Mass-Exploit
Cutting Through the php2shell Noise On October 20, details of php2shell, two pre-auth RCE vulnerabilities in the PHP core discovered by Calif (CVE-2026-109618 and…
CISA Confirms Active Exploitation of Two PHP2Shell Flaws Enabling Remote Code Execution
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Monday confirmed active exploitation of the recently patched PHP2Shell flaws by adding them to its…
CISA Adds Two Known Exploited Vulnerabilities to Catalog
CISA has added two new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog and updated the PHP Alert, Critical Vulnerabilities in PHP Require Immediate…