CVE-2026-45062
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/dunglas/frankenphpGo | >= 1.11.2, < 1.12.3 | 1.12.3 |
Affected products
1- Range: >= 1.11.2, <= 1.12.2
Patches
Vulnerability mechanics
References
5- github.com/advisories/GHSA-3g8v-8r37-cgjmghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-45062ghsaADVISORY
- github.com/php/frankenphp/commit/2d0f480329a02571d6f635dad9fdb066e1a11e81ghsaWEB
- github.com/php/frankenphp/releases/tag/v1.12.3nvdWEB
- github.com/php/frankenphp/security/advisories/GHSA-3g8v-8r37-cgjmnvdWEB
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