Riskcovery

CVE-2026-45062

FrankenPHP: Unsafe Unicode Handling in CGI Path Splitting Allows Execution of Non-PHP Files

State
Published
Severity
8.1 High
Published
Jun 10, 2026
Updated
Jun 11, 2026
Reserved
May 8, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.18.1 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HGitHub_M

Weaknesses

  • CWE-20 Improper Input Validation
  • CWE-176 Improper Handling of Unicode Encoding
  • CWE-178 Improper Handling of Case Sensitivity

Affected Products

ProductVersions
frankenphpphp
  • >= 1.11.2, < 1.12.3Affected

References

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