CVSSv3 Score: 9.8 CVE-2026-109618PHP 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.
PHP core RCE vulnerability patches (CVE-2026-109618 and CVE-2026-109619)
About this summary. This is a short excerpt from the description that Fortinet PSIRT published with its article. Cyber Security News did not report or verify the underlying story. Read the original: https://fortiguard.fortinet.com/psirt/FG-IR-26-186
Source attribution: headline and facts are from Fortinet PSIRT (fortiguard.fortinet.com). Summary method: excerpt of the source description. See our source attribution policy.
Related coverage
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…
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…
Responder Guidance for PHP2Shell (CVE-2026-109618 and CVE-2026-109619)
On October 21, 2026, the PHP project disclosed two critical memory-corruption vulnerabilities that can allow unauthenticated remote code execution. Both are fixed in PHP…
The adversary economy: How threat actors are reacting to PHP2Shell
Two critical PHP vulnerabilities sent criminal forum operators scrambling to protect their own infrastructure, revealing that threat actors face the same exposure…
PHP2Shell Exploit Tooling Found on Exposed Attacker Server
SOCRadar Threat Intelligence Unit (STRU) researchers found PHP2Shell exploit tooling on an attacker-controlled server whose working directory was exposed through an…
PHP2Shell Attacks Started Four Days Before Public Disclosure, AWS Reports
AWS detected PHP2Shell exploit attempts four days before disclosure, highlighting the risk of attackers exploiting critical flaws before patches arrive. Attackers…