Recently, PHP officially released a security notice, disclosing two Remote Code Execution Vulnerabilities(CVE-2026-109618/ CVE-2026-109619).

CVE-2026-109618, PHP uses longjmp() for out-of-memory (OOM) errors to exit the current context and abort handling of the request. Some contexts may not properly account for this scenario and leave request memory in an uninitialized state before performing an allocation. The subsequent request cleanup procedure may read or branch on this memory. Multiple OOM strategies can consistently trigger this condition and lead to remote code execution (RCE).

CVE-2026-109619, PHP has various global state that temporarily points into request memory. In some scenarios, global state may not be correctly reset, or may be repopulated after being reset. The global state may then refer to request memory even after it has been freed. Subsequent requests may read or branch on this stale state before it is fully initialized. Multiple strategies can trigger this condition and produce remote code execution (RCE).

PHP is a widely used open-source server-side scripting language for web applications and dynamic sites. If you are a PHP user, check your system and implement timely security hardening.

Reference:

https://github.com/php/php-src/security/advisories/GHSA-w8hw-w9fx-j79w

https://github.com/php/php-src/security/advisories/GHSA-6wmf-4rv5-p3rp

critical

(Severity: low, medium, important, and critical)

PHP < 8.5.12

PHP < 8.4.27

PHP < 8.3.36

PHP < 8.2.35

PHP >= 8.5.12

PHP >= 8.4.27

PHP >= 8.3.36

PHP >= 8.2.35

Both vulnerabilities have been fixed in later official versions. If your service version falls into the affected range, upgrade it to the corresponding security version.

https://www.php.net/archive/2026.php

Note: Before fixing vulnerabilities, back up your files and conduct a thorough test.

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