high8.1
CVE-2026-45062
FrankenPHP: Unsafe Unicode Handling in CGI Path Splitting Allows Execution of Non-PHP Files
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/dunglas/frankenphp | >= 1.11.2, <= 1.12.2 | 1.12.3 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-3g8v-8r37-cgjm
- https://github.com/php/frankenphp/security/advisories/GHSA-3g8v-8r37-cgjm
- https://github.com/php/frankenphp/commit/2d0f480329a02571d6f635dad9fdb066e1a11e81
- https://nvd.nist.gov/vuln/detail/CVE-2026-45062
- https://github.com/php/frankenphp/releases/tag/v1.12.3