Is CVE-2026-48062 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-48062 being exploited in the wild.

How severe is CVE-2026-48062?

Critical severity, with a CVSS score of 9.8, published 17 July 2026.

Which products and versions are affected?

CodeIgniter Foundation CodeIgniter4 < 4.7.2, < 4.7.3; codeigniter4/framework (Packagist) < 4.7.2, ECOSYSTEM:introduced=0,fixed=4.7.3.

Is there a fix for CVE-2026-48062?

Yes. codeigniter4/framework (Packagist): upgrade to 4.7.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-48062 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-48062?

Check whether you run CodeIgniter Foundation CodeIgniter4 or codeigniter4/framework (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-48062: CodeIgniter CodeIgniter4 file upload validation bypass in ext_in rule

Q: Is there a fix for CVE-2026-48062?

Yes. codeigniter4/framework (Packagist): upgrade to 4.7.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Q: How is CVE-2026-48062 attacked?

It is attacked over the network, in a software library.

Q: Am I affected by CVE-2026-48062?

Check whether you run CodeIgniter Foundation CodeIgniter4 or codeigniter4/framework (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-48062 · Severity: critical · CVSS 9.8 · Published 2026-07-17

CodeIgniter is a popular framework used by developers to build PHP websites. A security flaw in its file upload validation system allows attackers to bypass file type restrictions by disguising malicious scripts (like PHP shells) as harmless images. If a website using this framework allows users to upload files to a public folder, an attacker could take full control of the web server and access sensitive data.

Technologies: CodeIgniter Foundation CodeIgniter4, codeigniter4/framework (Packagist). Vendors: CodeIgniter Foundation, Packagist.

Quick answers

Is CVE-2026-48062 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-48062 being exploited in the wild.
How severe is CVE-2026-48062?: Critical severity, with a CVSS score of 9.8, published 17 July 2026.
Which products and versions are affected?: CodeIgniter Foundation CodeIgniter4 < 4.7.2, < 4.7.3; codeigniter4/framework (Packagist) < 4.7.2, ECOSYSTEM:introduced=0,fixed=4.7.3.
Is there a fix for CVE-2026-48062?: Yes. codeigniter4/framework (Packagist): upgrade to 4.7.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-48062 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-48062?: Check whether you run CodeIgniter Foundation CodeIgniter4 or codeigniter4/framework (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

codeigniter4/framework (Packagist): upgrade to 4.7.3 or later
```
composer require codeigniter4/framework:^4.7.3
```

Technical details

A vulnerability exists in CodeIgniter 4's `ext_in` upload validation rule within `system/Validation/StrictRules/FileRules.php`. The rule incorrectly validates the MIME-derived guessed extension rather than the actual client-provided filename extension. An attacker can exploit this by uploading a file with a dangerous extension (e.g., .php) containing content that mimics a safe MIME type (e.g., a GIF header). If the application saves the file using its original name in a web-accessible directory, the attacker can execute arbitrary code. This issue is resolved in version 4.7.3 by ensuring the rule validates the client-provided extension.

Affected products

CodeIgniter Foundation CodeIgniter4 < 4.7.3

Identifiers

CVE-2026-48062
GHSA-2gr4-ppc7-7mhx

Timeline

2026-05-20: advisory: GitHub Security Advisory published
2026-05-22: patched: Version 4.7.3 released
2026-07-17: disclosed: CVE-2026-48062 published to NVD

References

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