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TI-2026-32910 Aliases CVE-2026-45062GHSA-3g8v-8r37-cgjm

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

Priority HIGH 70CWE-176Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00714 53rd percentileScored 2026-11-07
Fix Fixed frankenphp (php): 1.12.3github.com/dunglas/frankenphp (Go): 1.12.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
PHPfrankenphp1.11.2 to before 1.12.31.12.3Patch availableCNA
—github.com/dunglas/frankenphp (Go)1.11.2 to before 1.12.31.12.3Patch availableGHSA-3g8v-8r37-cgjm
  • frankenphp VendorPHP Affected 1.11.2 to before 1.12.3 Fixed in 1.12.3 Patch available CNA
  • github.com/dunglas/frankenphp (Go) Vendor— Affected 1.11.2 to before 1.12.3 Fixed in 1.12.3 Patch available GHSA-3g8v-8r37-cgjm

Remediation

  • Fix · CNA frankenphp (php) Fixed in 1.12.3
  • Fix · GHSA-3g8v-8r37-cgjm github.com/dunglas/frankenphp (Go) Fixed in 1.12.3 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-45062
  2. 2026-10-03 Alias added: GHSA-3g8v-8r37-cgjm
  3. 2026-10-25 EPSS moved to the below the 50th percentile
  4. 2026-10-26 EPSS moved to the 50th–90th percentile

References

Advisory 1

Other 4

  • TI-2024-04260 Argument Injection in PHP-CGI KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2016-08118 The mailSend function in the isMail transport in PHPMailer before 5.2.18 might allow… KEVCVSS 3.1CRITICAL 9.8
  • TI-2012-01607 sapi/cgi/cgi_main.c in PHP before 5.3.12 and 5.4.x before 5.4.2, when configured as a CGI… KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-78794 PHP remote code execution via stale global state KEVCVSS 4.0CRITICAL 9.2
  • TI-2026-78793 Out-of-memory handling flaw in PHP allows remote code execution KEVCVSS 4.0CRITICAL 9.2
See all 777 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences