{"id":"CVE-2026-109618","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-109618","generatedAt":"2026-10-28T08:11:14.033Z","title":"PHP Memory Corruption Vulnerability","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).","published":"2026-10-21T14:17:09.000Z","lastModified":"2026-10-28T04:17:47.000Z","status":"Analyzed","sourceIdentifier":"security@php.net","cvss":{"version":"4.0","score":9.2,"severity":"CRITICAL","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-416","CWE-755","CWE-824","CWE-1325"],"affected":["php/php","siemens/ruggedcom ape1808 firmware","paloaltonetworks/pan-os","paloaltonetworks/panorama virtual appliance"],"epss":{"score":0.99999,"percentile":0.99998,"date":"2026-10-27","history":[{"date":"2026-10-22","score":0.05307,"percentile":0.92563},{"date":"2026-10-23","score":0.1162,"percentile":0.96047},{"date":"2026-10-25","score":0.99981,"percentile":0.99981}]},"kev":{"listed":true,"dateAdded":"2026-10-26","dueDate":"2026-10-29","knownRansomwareCampaignUse":"Unknown","notes":"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.\nThis vulnerability affects an open-source component, third-party library, protocol, or proprietary implementation that could be used by different products. For more information, please see: https://www.php.net/ ; https://www.cisa.gov/news-events/alerts/2026/10/21/critical-vulnerabilities-php-require-immediate-patching ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ;  https://nvd.nist.gov/vuln/detail/CVE-2026-109618"},"exploits":{"count":1,"verified":true,"firstPublished":"2026-10-22","source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[{"edbId":52704,"kind":"exploit","title":"PHP2Shell (CVE-2026-109618) - PHP core versions after v5.4 - RCE","url":"https://www.exploit-db.com/exploits/52704","sourceUrl":"https://gitlab.com/exploit-database/exploitdb/-/blob/main/exploits/php/remote/52704.py","file":"exploits/php/remote/52704.py","published":"2026-10-22","added":"2026-10-22","updated":"2026-10-26","author":"OffSec","type":"remote","platform":"php","port":null,"verified":true,"codes":["CVE-2026-109618"],"tags":null,"aliases":null,"applicationUrl":null,"screenshotUrl":null,"referenceUrl":null}]},"verdict":{"level":"urgent","text":"Known to be exploited in the wild (CISA KEV, CISA remediation deadline 29 October 2026). Treat as an emergency change: patch or isolate now, then hunt for prior compromise."},"changes":[{"kind":"kev","label":"Added to KEV","at":"2026-10-26T00:00:00.000Z","detail":{"name":"PHP Memory Corruption Vulnerability","vendor":"PHP Group","dueDate":"2026-10-29","product":"PHP","ransomware":"Unknown"},"summary":"Added to CISA KEV — known to be exploited; federal remediation due 2026-10-29."},{"kind":"epss","label":"EPSS jump","at":"2026-10-25T00:00:00.000Z","detail":{"to":0.99981,"from":0.11841,"percentile":0.99981},"summary":"EPSS moved from 11.8% to 100.0% probability of exploitation in the next thirty days."},{"kind":"epss","label":"EPSS jump","at":"2026-10-23T00:00:00.000Z","detail":{"to":0.1162,"from":0.05307,"percentile":0.96047},"summary":"EPSS moved from 5.3% to 11.6% probability of exploitation in the next thirty days."},{"kind":"exploit","label":"Public exploit","at":"2026-10-22T00:00:00.000Z","detail":{"type":"remote","edbId":52704,"title":"PHP2Shell (CVE-2026-109618) - PHP core versions after v5.4 - RCE","platform":"php","verified":false,"publishedAt":"2026-10-22"},"summary":"Public exploit published in Exploit-DB: PHP2Shell (CVE-2026-109618) - PHP core versions after v5.4 - RCE (remote, php)."},{"kind":"new","label":"New CVE","at":"2026-10-21T14:17:09.000Z","detail":{"score":"9.2","severity":"CRITICAL","publishedAt":"2026-10-21T14:17:09.357Z"},"summary":"New CVE, critical severity (CVSS 9.2), EPSS 100.0%."}],"references":[{"url":"https://github.com/php/php-src/security/advisories/GHSA-w8hw-w9fx-j79w","tags":["Mitigation","Vendor Advisory"],"source":"security@php.net"},{"url":"http://www.openwall.com/lists/oss-security/2026/10/21/6","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.openwall.com/lists/oss-security/2026/10/23/5","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://arcticwolf.com/resources/blog/php2shell-critical-php-vulnerabilities-enable-unauthenticated-remote-code-execution/","tags":["Third Party Advisory"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-566512.html","tags":["Third Party Advisory"],"source":"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"},{"url":"https://php2shell.delftintellab.com","tags":["Third Party Advisory"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-109618","tags":["US Government Resource"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://www.wiz.io/blog/php2shell-php-rce","tags":["Third Party Advisory"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-109618","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}