Path-Split Interpretation Conflict in FrankenPHP Affects Execution of Protected PHP Scripts
CVE-2026-128025

6.9MEDIUM

Key Information:

Vendor

PHP
Status
FrankenPHP
Vendor
CVE Published:
13 November 2026

What is CVE-2026-128025?

FrankenPHP prior to version 1.13.0 is susceptible to a path-split interpretation conflict, allowing attackers to exploit the splitPos function in cgi.go. By crafting requests with manipulated filenames, such as /uploads/a.php.txt/b.php, attackers can circumvent route-level protections or Web Application Firewall (WAF) rules. This vulnerability permits the execution of restricted PHP scripts by forging key parameters like PATH_INFO, SCRIPT_NAME, and PHP_SELF, posing a significant security risk for applications using this version of FrankenPHP.

Affected Version(s)

frankenphp 0 < 1.13.0

frankenphp 1.13.0

References

https://github.com/php/frankenphp/security/advisories/GHS...
vendor-advisory
https://www.vulncheck.com/advisories/frankenphp-before-1....
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Reload3d
.