Use of Less Trusted Source Affecting codeigniter4/framework package, versions <4.7.4
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PHP-CODEIGNITER4FRAMEWORK-18600661
- published9 Aug 2026
- disclosed7 Aug 2026
- creditUnknown
Introduced: 7 Aug 2026
NewCVE-2026-63220 (opens in a new tab)How to fix?
Upgrade codeigniter4/framework to version 4.7.4 or higher.
Overview
codeigniter4/framework is a PHP full-stack web framework that is light, fast, flexible, and secure.
Affected versions of this package are vulnerable to Use of Less Trusted Source via the IncomingRequest::isSecure function. An attacker can cause the application to incorrectly treat insecure HTTP requests as secure by spoofing the X-Forwarded-Proto or Front-End-Https headers. This is only exploitable if the backend is directly reachable over HTTP or if a reverse proxy or load balancer forwards client-supplied forwarding headers without stripping or overwriting them.
Workaround
This vulnerability can be mitigated by enforcing HTTP-to-HTTPS redirects outside the application, such as with web server or load balancer configuration, and ensuring that reverse proxies strip or overwrite client-supplied forwarding headers before forwarding requests.