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

Quick assessment

Affected
codeigniter4 CodeIgniter4
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

codeigniter4 CodeIgniter4是codeigniter4组织开源的一款轻量级Web开发框架。 CodeIgniter4 4.7.4之前版本存在信任管理问题漏洞，该漏洞源于IncomingRequest::isSecure()信任来自任意请求的X-Forwarded-Proto和Front-End-Https标头，可能导致攻击者伪造这些标头，导致应用错误地将HTTP请求视为安全。

CVSS 4.8 · Medium EPSS 0.17% · P6

Affected Version Matrix 1

VendorProduct Version RangeStatus
codeigniter4 CodeIgniter4 < 4.7.4 affected
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I. Basic Information for CVE-2026-63220

Vulnerability Information
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Vulnerability Title
CodeIgniter: Spoofable forwarded HTTPS headers in IncomingRequest::isSecure()
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用不可信的源
Source: CVE Program / CVE List V5
Vulnerability Title
CodeIgniter4 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
codeigniter4 CodeIgniter4是codeigniter4组织开源的一款轻量级Web开发框架。 CodeIgniter4 4.7.4之前版本存在信任管理问题漏洞，该漏洞源于IncomingRequest::isSecure()信任来自任意请求的X-Forwarded-Proto和Front-End-Https标头，可能导致攻击者伪造这些标头，导致应用错误地将HTTP请求视为安全。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
codeigniter4 CodeIgniter4 < 4.7.4 -

II. Public POCs for CVE-2026-63220

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III. Intelligence Information for CVE-2026-63220

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Patches & Fixes for CVE-2026-63220 (1)

Vendor Advisories for CVE-2026-63220 (1)

Vendor Pages for CVE-2026-63220 (1)

Same Patch Batch · codeigniter4 · 2026-07-31 · 4 CVEs total

CVE-2026-63223 9.8 CRITICAL CodeIgniter: Uploaded file extension validation bypass in is_image and mime_in rules
CVE-2026-63221 9.4 CRITICAL CodeIgniter: SQL injection is possible via Query Builder deleteBatch() when used with wher
CVE-2026-63222 7.5 HIGH CodeIgniter: Path traversal in UploadedFile::move() when using client-provided filenames

IV. Related Vulnerabilities

Same product: CodeIgniter4
Same vendor: codeigniter4
Same weakness: CWE-348

V. Comments for CVE-2026-63220

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