CVE-2026-109619: PHP Group PHP (Critical, CVSS 9.2)
- CVSS
- 9.2 Critical (v4.0)
- EPSS
- 5.8% chance of exploitation in the next 30 days (higher than 93% of CVEs)
- Exploited in the wild
- Not on CISA’s KEV list
- Public exploit
- Yes, reported in 15 GitHub repositories
- Weakness
- CWE-1325, CWE-416, CWE-755, CWE-824
- Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N- Published
- Oct 21, 2026
What it is
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).
Description from the National Vulnerability Database.
What to do
Check whether you run PHP Group PHP, then apply the vendor’s fix or mitigation from the advisories below. Because this flaw is exploited or has public exploit code, treat it as urgent and check for signs of compromise, not just the patch level.
Advisories and fixes
ThreatRoundup coverage
PHP2Shell Was Being Exploited Four Days Before Anyone Knew
Leaked ‘php2shell’ Bugs Force PHP Into an Emergency Patch Day
Sources: NVD, FIRST EPSS, CISA KEV, and public exploit databases (availability only). ThreatRoundup reports whether public exploit code exists but never links to it: fake proof-of-concepts that infect security researchers are common. This page updates automatically.