CVE-2026-109618 (GCVE-0-2026-109618)
Vulnerability from cvelistv5
Published
2026-10-21 13:48
Modified
2026-10-28 03:55
Severity ?
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
CWE
  • CWE-416 - Use after free
  • CWE-755 - Improper Handling of Exceptional Conditions
  • CWE-824 - Access of uninitialized pointer
  • CWE-1325 - Improperly controlled sequential memory allocation
  • CWE-1419 - Incorrect Initialization of Resource
Summary
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).
References
Impacted products
Vendor Product Version
PHP Group PHP Version: 8.2.*   ≤
Version: 8.3.*   ≤
Version: 8.4.*   ≤
Version: 8.5.*   ≤
Create a notification for this product.
CISA Known Exploited Vulnerability
Data from the CISA Known Exploited Vulnerabilities Catalog

Date added: 2026-10-26

Due date: 2026-10-29

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.

Used in ransomware: Unknown

Notes: This 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

Show details on NVD website

To clipboard 

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