TI-2026-45101 Aliases CVE-2026-63223 GHSA-mmj4-63m4-r6h5

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

MEDIUM 50CWE-434Published 2026-07-31 · Updated 2026-07-31

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-434.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.008 56th percentileScored 2026-11-07

Fix Fixed CodeIgniter4 (codeigniter4): 4.7.4codeigniter4/framework (Packagist): 4.7.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Total

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
codeigniter4	CodeIgniter4	before 4.7.4	4.7.4	Patch available	CNA
—	codeigniter4/framework (Packagist)	before 4.7.4	4.7.4	Patch available	GHSA-mmj4-63m4-r6h5

CodeIgniter4 Vendorcodeigniter4 Affected before 4.7.4 Fixed in 4.7.4 Patch available CNA
codeigniter4/framework (Packagist) Vendor— Affected before 4.7.4 Fixed in 4.7.4 Patch available GHSA-mmj4-63m4-r6h5

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:codeigniter:codeigniter::::::::	—	—	codeigniter4

cpe:2.3:a:codeigniter:codeigniter:*:*:*:*:*:*:*:* Versions — — ·codeigniter4

Remediation

Fix · CNA CodeIgniter4 (codeigniter4) Fixed in 4.7.4
Fix · GHSA-mmj4-63m4-r6h5 codeigniter4/framework (Packagist) Fixed in 4.7.4 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-63223
2026-10-03 Alias added: GHSA-mmj4-63m4-r6h5

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-63223

Other 4

TI-2014-07135 CodeIgniter before 3.0 and Kohana 3.2.3 and earlier and 3.3.x through 3.3.2 make it… CVSS 3.0CRITICAL 9.8
TI-2022-16370 SameSite may allow cross-site request forgery (CSRF) protection to be bypassed CVSS 3.1HIGH 8.8
TI-2022-06025 Deserialization of Untrusted Data in Codeigniter4 CVSS 3.1CRITICAL 9.8
TI-2024-27591 A Cross-Site Request Forgery (CSRF) in Codeigniter 3.1.13 allows attackers to arbitrarily… CVSS 3.1HIGH 7.5
TI-2014-07136 CodeIgniter before 2.2.0 makes it easier for attackers to decode session cookies by… CVSS 3.0CRITICAL 9.8
TI-2024-19671 CodeIgniter4 Language class DoS Vulnerability CVSS 3.1HIGH 7.5

See all 48 →

Sources

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