Critical Vulnerability CVE-2026-77647 in SPIP Allows Remote Code Execution

## Overview CVE-2026-77647 is a critical vulnerability affecting SPIP versions before 4.4.20. This flaw allows unauthenticated remote attackers to execute arbitrary code. The vulnerability was exploited in the wild in August 2026. ## Technical Details The issue stems from incorrect identification of PHP blocks, specifically the handling of `<?php` tags. Additionally, the `var_export` function mishandles certain cases, particularly when a '<' character is present. This mismanagement creates a pathway for attackers to inject and execute malicious code remotely. ## Impact Successful exploitation of CVE-2026-77647 can lead to full system compromise. Attackers can gain control over affected systems, potentially leading to data breaches, service disruptions, or further exploitation of connected systems. Given the severity rating of 9.8, this vulnerability poses a significant risk to organizations using SPIP. ## Mitigation Defenders should prioritize updating SPIP to version 4.4.20 or later immediately. Regularly monitor systems for any signs of exploitation and review logs for unusual activity. Implement additional security measures, such as web application firewalls, to help detect and block potential attacks. Regular security assessments can also help identify and mitigate vulnerabilities before they are exploited.