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CVE-2024-8926: PHP CGI Parameter Injection Vulnerability (CVE-2024-4577 bypass)

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2024-10-08 · updated 2026-06-17
• Weakness: CWE-78

Description

In PHP versions 8.1.* before 8.1.30, 8.2.* before 8.2.24, 8.3.* before 8.3.12, when using a certain non-standard configurations of Windows codepages, the fixes for  CVE-2024-4577 https://github.com/advisories/GHSA-vxpp-6299-mxw3  may still be bypassed and the same command injection related to Windows "Best Fit" codepage behavior can be achieved. This may allow a malicious user to pass options to PHP binary being run, and thus reveal the source code of scripts, run arbitrary PHP code on the server, etc.

Affected products

• PHP: from 8.1.0 before 8.1.30; from 8.2.0 before 8.2.24; from 8.3.0 before 8.3.12 — fixed in 8.1.30, 8.2.24, 8.3.12

How to fix

Upgrade to a fixed version: PHP 8.1.30, 8.2.24, 8.3.12. Check the vendor advisory for mitigations.

References

• https://github.com/php/php-src/security/advisories/GHSA-p99j-rfp4-xqvq
• https://security.netapp.com/advisory/ntap-20241101-0003/

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