CVE-2026-45062

Summary

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 Software

VendorProductVersion RangeStatus
phpfrankenphp>= 1.11.2, < 1.12.3affected

Weaknesses

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

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: poc
    • Automatable: no
    • Technical Impact: total

Additional References

References