CVE-2026-63223 PUBLISHED

CodeIgniter: Uploaded file extension validation bypass in is_image and mime_in rules

Assigner: GitHub_M
Reserved: 15.07.2026 Published: 31.07.2026 Updated: 31.07.2026

CodeIgniter is a PHP full-stack web framework. Prior to 4.7.4, the is_image and mime_in upload validation rules do not independently enforce a safe client filename extension, allowing a remote attacker to upload executable content when an application preserves the client filename and stores uploads in a web-accessible script-enabled directory. Applications are impacted when they validate uploads using is_image or mime_in without an independent safe extension check (such as ext_in on patched versions), save uploaded files using the client-supplied filename, and place uploads in a web-accessible directory where PHP files can execute. This issue is fixed in version 4.7.4.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 9.8

Product Status

Vendor codeigniter4
Product CodeIgniter4
Versions
  • Version < 4.7.4 is affected

References

Problem Types

  • CWE-434: Unrestricted Upload of File with Dangerous Type CWE