CVE-2026-63223
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.
- Score
- CVSS 3.1 9.8 Critical
- Status
- Deferred - security-advisories@github.com
- Published
- 2026-07-31
- Last modified
- 2026-07-31
- Weaknesses
- CWE-434
Affected products
References
- https://github.com/codeigniter4/CodeIgniter4/commit/b6e9a4fa1dca2df3d3f261bdf61532df8c6420aa
- https://github.com/codeigniter4/CodeIgniter4/releases/tag/v4.7.4
- https://github.com/codeigniter4/CodeIgniter4/security/advisories/GHSA-mmj4-63m4-r6h5
