Cross-Site Request Forgery (CSRF) Protection Bypass Vulnerability in CodeIgniter4
Impact
This vulnerability might allow remote attackers to bypass the CodeIgniter4 CSRF protection mechanism.
Patches
Upgrade to v4.1.9 or later.
Workarounds
These are workarounds for this vulnerability, but you will still need to code as these after upgrading to v4.1.9. Otherwise, the CSRF protection may be bypassed.
When Auto-Routing is Enabled
- Check the request method in the controller method before processing.
E.g.:
if (strtolower($this->request->getMethod()) !== 'post') {
return $this->response->setStatusCode(405)->setBody('Method Not Allowed');
}When Auto-Routing is Disabled
Do one of the following:
- Do not use
$routes->add(), and use HTTP verbs in routes. - Check the request method in the controller method before processing.
E.g.:
if (strtolower($this->request->getMethod()) !== 'post') {
return $this->response->setStatusCode(405)->setBody('Method Not Allowed');
}References
For more information
If you have any questions or comments about this advisory:
- Open an issue in codeigniter4/CodeIgniter4
- Email us at SECURITY.md
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | codeigniter4/framework | < 4.1.9 | 4.1.9 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:L- Weakness (CWE)
CWE-352- Platform
- Composer
- Package
codeigniter4/framework- Disclosed
- 01.03.2022
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-4v37-24gm-h554 - CC BY 4.0
Vulnerability history: codeigniter4/framework
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 19
- First → latest
- 01.2022 08.2026
- Without a fix
- 1
- Exploited in attacks
- 0
Severity breakdown
- Critical 6
- High 8
- Medium 4
- Low 1
Disclosures per year
- 2022: 9
- 2023: 2
- 2024: 1
- 2025: 2
- 2026: 5
-
Cross-Site Request Forgery (CSRF) Protection Bypass Vulnerability in CodeIgniter4 this entry
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