CVE-2026-63220 CodeIgniter: Spoofable forwarded HTTPS headers in IncomingRequest::isSecure()
Attackers can spoof HTTPS headers to bypass secure connection checks in CodeIgniter applications, potentially exposing sensitive data or allowing insecure access.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-63220?
CVE-2026-63220 is a medium-severity vulnerability in CodeIgniter4, published on 31 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
CodeIgniter is a PHP full-stack web framework. In versions prior to 4.7.4, IncomingRequest::isSecure() trusted the X-Forwarded-Proto and Front-End-Https headers from any incoming request, allowing an attacker could spoof these headers and cause the application to incorrectly treat an HTTP request as secure. This may have impacted applications that rely on isSecure(), force_https(), forceGlobalSecureRequests, or similar logic to enforce HTTPS-only access or make security-sensitive decisions. Exploitability depends on deployment configuration. Applications are most exposed if the backend is reachable directly over HTTP, or if a reverse proxy/load balancer forwards client-supplied forwarding headers without stripping or overwriting them. This issue has been fixed in version 4.7.4.
Weakness: CWE-348
Which versions are affected by CVE-2026-63220?
2 open source packages ship an affected version, including codeigniter4/framework.
| Package | Affected | Fixed in |
|---|---|---|
codeigniter4/framework Packagist | All versions | 4.7.4 |
codeigniter4/framework Packagist | All versions | 4.7.4 |
How do I fix CVE-2026-63220?
Upgrade codeigniter4/framework to 4.7.4 or later.
Is CVE-2026-63220 being exploited?
There is no known exploitation of CVE-2026-63220 in the wild and no public exploit code.
Sources
Also known as GHSA-7wmf-pw8j-mc78, UBUNTU-CVE-2026-63220.