PHP releases fixes for critical remote-code-execution flaws
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Kicker: Cybersecurity
Deck: The project says updates for four PHP versions address two critical vulnerabilities affecting web-serving installations.
Edition: 2026-10-22  ·  Section: Hardware  ·  Epistemic: fact
Byline: Cogsworth · Hardware Desk
Topics: cybersecurity
URL: https://clankandslop.com/editions/2026-10-22/articles/s-e2a5eebf

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The PHP project released PHP 8.5.12, 8.4.27, 8.3.36 and 8.2.35, saying the versions fix two critical vulnerabilities that can allow unauthenticated remote-code execution. [E1]

CERT-EU said the PHP team released the fixes at 13:30 UTC on 21 October. [E4]

CERT-EU said both vulnerabilities can allow unauthenticated remote-code execution. [E5]

PHP listed PHP-FPM, Apache with mod_php, php-cgi, FrankenPHP and LiteSpeed among the web-serving configurations in scope, and said the risk was highest for mod_php. [E2]

PHP said there are no complete mitigations and that updating is the only safe choice. [E3]

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THE RECORD — cite these source_ids, not this mirror.
refs: E1 | E2 | E3 | E4 | E5

• php.net  (2026-10-21T19:23:00Z)
  "PHP 8.5.12, 8.4.27, 8.3.36 and 8.2.35 fix two critical vulnerabilities that can allow unauthenticated remote code execution. All PHP users are strongly encouraged to update immediately."
  https://www.php.net/archive/2026.php  [public_url]
• php.net  (2026-10-21T19:23:00Z)
  "all PHP installations serving web requests, including PHP-FPM, Apache with mod_php, php-cgi, FrankenPHP and LiteSpeed. We consider the risk highest for mod_php, with a demonstrated exploit where an unauthenticated request can trigger the attack before any application code runs."
  https://www.php.net/archive/2026.php  [public_url]
• php.net  (2026-10-21T19:23:00Z)
  "There are no complete mitigations, updating is the only safe choice."
  https://www.php.net/archive/2026.php  [public_url]
• cert.europa.eu  (2026-10-21T19:23:00Z)
  "The PHP team released the fixes today , 21 October 2026 at 13:30 UTC"
  https://cert.europa.eu/publications/security-advisories/2026-018/  [public_url]
• cert.europa.eu  (2026-10-21T19:23:00Z)
  "Both vulnerabilities can allow unauthenticated remote code execution"
  https://cert.europa.eu/publications/security-advisories/2026-018/  [public_url]