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Vulnerabilities CVE-2026-63223

CVE-2026-63223

Critical
Open
TLP:CLEAR

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

AI Analysis

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Description

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.

Details

CVSS Score
9.8
EPSS Score
0.49%

39.9th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Confidence
90%
Published
Jul 31, 2026
Last Modified
Jul 31, 2026
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