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.
Published: 2026-07-31
Score: 9.8 Critical
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-mmj4-63m4-r6h5 CodeIgniter: Uploaded file extension validation bypass in `is_image` and `mime_in` rules
History

Sun, 02 Aug 2026 19:45:00 +0000

Type Values Removed Values Added
First Time appeared Codeigniter
Codeigniter codeigniter
Vendors & Products Codeigniter
Codeigniter codeigniter

Sat, 01 Aug 2026 00:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 31 Jul 2026 05:30:00 +0000

Type Values Removed Values Added
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.
Title CodeIgniter: Uploaded file extension validation bypass in is_image and mime_in rules
Weaknesses CWE-434
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}


Subscriptions

Codeigniter Codeigniter
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-07-31T23:16:24.574Z

Reserved: 2026-07-15T22:19:06.907Z

Link: CVE-2026-63223

cve-icon Vulnrichment

Updated: 2026-07-31T23:16:20.404Z

cve-icon NVD

Status : Received

Published: 2026-07-31T06:16:32.297

Modified: 2026-08-01T00:17:17.750

Link: CVE-2026-63223

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-02T19:30:17Z

Weaknesses