CVE-2026-109619
PHP Group PHP, Siemens RUGGEDCOM APE1808
Published 21 Oct 2026 · updated 26 Oct 2026 · Analyzed
Exploited in the wild
CISA added this to its Known Exploited Vulnerabilities catalog on 26 Oct 2026, with a remediation deadline of 29 Oct 2026 for US federal agencies.
Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Description
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).
References
- github.com/php/php-src/security/advisories/GHSA-6wmf-4rv5-p3rp · Mitigation, Vendor Advisory
- www.openwall.com/lists/oss-security/2026/10/21/16 · Mailing List, Third Party Advisory
- www.openwall.com/lists/oss-security/2026/10/21/17 · Mailing List, Third Party Advisory
- www.openwall.com/lists/oss-security/2026/10/21/23 · Mailing List, Third Party Advisory
- www.openwall.com/lists/oss-security/2026/10/21/7 · Mailing List, Third Party Advisory
- www.openwall.com/lists/oss-security/2026/10/22/14 · Mailing List, Third Party Advisory
- www.openwall.com/lists/oss-security/2026/10/22/15 · Mailing List, Third Party Advisory
- www.openwall.com/lists/oss-security/2026/10/22/16 · Mailing List, Third Party Advisory
- www.openwall.com/lists/oss-security/2026/10/22/19 · Mailing List, Third Party Advisory
- www.openwall.com/lists/oss-security/2026/10/22/2 · Mailing List, Third Party Advisory
- www.openwall.com/lists/oss-security/2026/10/22/20 · Mailing List, Third Party Advisory
- www.openwall.com/lists/oss-security/2026/10/23/4 · Mailing List, Third Party Advisory
- cert-portal.siemens.com/productcert/html/ssa-566512.html · Third Party Advisory
- www.wiz.io/blog/php2shell-php-rce · Third Party Advisory