SB2025011811 - Interpretation Conflict in CodeIgniter4

Description

This security bulletin contains information about 1 vulnerability.

1) Interpretation Conflict (CVE-ID: CVE-2025-24013)

CWE-ID: CWE-436 - Interpretation Conflict

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to interpretation conflict in Header class when processing user-supplied header names and values. A remote attacker can construct deliberately malformed headers to cause a denial of service.

Malformed headers may disrupt application functionality, cause errors, or generate invalid HTTP requests. In some cases, a remote service's web application firewall may interpret such requests as malicious and block further communication with the application.

Remediation

Install update from vendor's website.

References

• https://github.com/codeigniter4/CodeIgniter4/security/advisories/GHSA-x5mq-jjr3-vmx6
• https://github.com/advisories/GHSA-wxmh-65f7-jcvw