CVE-2026-109618
RCE via OOM corruption
- State
- Published
- Severity
- 9.2 Critical
- Published
- Oct 21, 2026
- Updated
- Oct 30, 2026
- Reserved
- Oct 12, 2026
Description
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).
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.2 Critical | 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 | php |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
PHPPHP Group |
|
References
- https://github.com/php/php-src/security/advisories/GHSA-w8hw-w9fx-j79wvendor-advisory
- https://www.wiz.io/blog/php2shell-php-rcethird-party-advisory
- https://arcticwolf.com/resources/blog/php2shell-critical-php-vulnerabilities-enable-unauthenticated-remote-code-execution/third-party-advisory
- https://php2shell.delftintellab.com/third-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-109618government-resource
- http://www.openwall.com/lists/oss-security/2026/10/21/6
- http://www.openwall.com/lists/oss-security/2026/10/23/5
- http://seclists.org/fulldisclosure/2026/Oct/51
- https://cert-portal.siemens.com/productcert/html/ssa-566512.html
- https://cert-portal.siemens.com/productcert/html/ssa-566435.html
- https://cert-portal.siemens.com/productcert/html/ssa-166980.html
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.