Vulnerability Description
FrankenPHP is a modern application server for PHP. From version 1.11.2 to before version 1.12.3, the splitPos() function in cgi.go misuses golang.org/x/text/search with search.IgnoreCase when the request path contains a non-ASCII byte. Two distinct flaws in that fallback let an attacker mislead FrankenPHP into treating a non-.php file as a .php script. In any deployment where the attacker can place content into a file served by FrankenPHP (uploads, file storage, etc.), this can be escalated to remote code execution by crafting a URL whose path triggers either flaw. This issue has been patched in version 1.12.3.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/php/frankenphp/releases/tag/v1.12.3
- https://github.com/php/frankenphp/security/advisories/GHSA-3g8v-8r37-cgjm
- https://github.com/php/frankenphp/security/advisories/GHSA-3g8v-8r37-cgjm
FAQ
What is CVE-2026-45062?
CVE-2026-45062 is a vulnerability with a CVSS score of 8.1 (HIGH). FrankenPHP is a modern application server for PHP. From version 1.11.2 to before version 1.12.3, the splitPos() function in cgi.go misuses golang.org/x/text/search with search.IgnoreCase when the requ...
How severe is CVE-2026-45062?
CVE-2026-45062 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-45062?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.