For TYPO3, PHP2Shell remediation requires patching the PHP runtime. The application version helps identify compatibility blockers; it cannot establish exploitability or prove that either CVE is fixed.

TYPO3 - PHP compatibility for the PHP2Shell fix

Candidates match only this declaration against the first PHP2Shell fixes on supported branches. They do not establish tested compatibility, vendor support or a complete dependency match. PHP compatibility for the PHP2Shell fix ↗

Identify the PHP2Shell repair scope

Files and package identity

typo3/cms-core

  • composer.lock
  • config/system/
  • typo3conf/ext/

TYPO3 - Remove blockers to patch PHP2Shell

TYPO3 core and extension constraints must move together. Inspect custom extensions, Fluid templates, TypoScript and site configuration before a major upgrade. Use the documented Upgrade Wizards in staging and verify backend editing as well as the public site. A core package minimum does not establish support for every extension or an extended-support contract.

Dependencies and custom code to review

  • Extension Manager
  • EXT:
  • Fluid
  • TypoScript
  • config/sites/
  • Upgrade Wizards
  • scheduler
Official upgrade documentation ↗

Check site functions after the PHP2Shell fix

Inventory before fixing PHP2Shell

Use an authorized working copy.

Command example
php -v
php --ini
composer --no-plugins show --locked typo3/cms-core
composer --no-plugins check-platform-reqs --lock
composer --no-plugins prohibits php 8.3.36 --locked

TYPO3 - PHP2Shell patch verification

Verify both CVE fixes in the PHP actually serving this site. Replace or restart old Web workers, queue workers and replicas. A working homepage or a newer CLI binary is insufficient evidence.

3. Restart and verify every instance ↗

Official upgrade documentation

TYPO3Original source ↗PHP security teamOriginal source ↗CVE-2026-109618Original source ↗CVE-2026-109619Original source ↗PHP2Shell repair - solve PHP upgrade errors↗

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