CVE-2026-109619: PHP Stale Internal Request-State Vulnerability

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).

Details

Frequently asked questions

Is CVE-2026-109619 being actively exploited?

Yes — CISA lists CVE-2026-109619 in its Known Exploited Vulnerabilities (KEV) catalog, so it is confirmed exploited in the wild. Patch it as a priority.

What does CVE-2026-109619 affect?

CVE-2026-109619 affects PHP Group · PHP.

How do I fix CVE-2026-109619?

Apply the vendor’s patch for the affected software. The federal patch deadline was Oct 29, 2026. Then check whether your personal data was exposed in any related breach.

References

• github.com/php/php-src/security/advisories/GHSA-6wmf-4rv5-p3rp
• www.openwall.com/lists/oss-security/2026/10/21/16
• www.openwall.com/lists/oss-security/2026/10/21/17
• www.openwall.com/lists/oss-security/2026/10/21/23
• www.openwall.com/lists/oss-security/2026/10/21/7
• www.openwall.com/lists/oss-security/2026/10/22/14
• www.openwall.com/lists/oss-security/2026/10/22/15
• www.openwall.com/lists/oss-security/2026/10/22/16

Official records: NVD · CISA KEV

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