CVE-2026-63223 json
CodeIgniter: Uploaded file extension validation bypass in is_image and mime_in rules
published 3mo ago modified 2mo ago also EUVD-2026-51399 , GHSA-mmj4-63m4-r6h5
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 57%
- public exploits
- 0
- none known
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.
Patch / fix
- packagist codeigniter4/framework 4.7.4
- codeigniter codeigniter 4.7.4
Is CVE-2026-63223 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 3mo ago
Exploit prediction
0.80% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| GitHub | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | codeigniter4/framework | <4.7.4 |
4.7.4 |
Affected products
- codeigniter4 CodeIgniter4
Classification
- Weakness
-
- CWE-434 Unrestricted Upload of File with Dangerous Type
References
-
github.com
/codeigniter4/CodeIgniter4/commit/b6e9a4fa1dca2df3d3f261bdf61532df8c6420aa
web
-
github.com
/codeigniter4/CodeIgniter4/security/advisories/GHSA-mmj4-63m4-r6h5
web
-
github.com
/codeigniter4/CodeIgniter4/releases/tag/v4.7.4
web
-
nvd.nist.gov
/vuln/detail/CVE-2026-63223
advisory
-
github.com
/codeigniter4/CodeIgniter4
package
Sources
- CVE List CVE-2026-63223
- GitHub Advisory GHSA-mmj4-63m4-r6h5
- NVD CVE-2026-63223
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.