# CVE-2026-77634

## Summary

- **CVE ID:** CVE-2026-77634
- **Severity:** HIGH
- **CVSS Score:** 8.2 (CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-93
- **Published:** Aug 24, 2026
- **Last Modified:** Aug 25, 2026

## Description

CakePHP is a rapid development framework for PHP. Prior to versions 4.5.12, 4.6.5, 5.1.8, 5.2.14, and 5.3.7 on their respective release lines, custom mail headers added with Message::setHeaders() or Message::addHeaders() do not have CRLF bytes removed, allowing header injection when user-controlled data is used in message headers. This issue is fixed in versions 4.5.12, 4.6.5, 5.1.8, 5.2.14, and 5.3.7.

## Affected Products

- cakephp — cakephp (>= 4.5.0, < 4.5.12)
- cakephp — cakephp (>= 4.6.0, < 4.6.5)
- cakephp — cakephp (>= 5.0.0, < 5.1.9)
- cakephp — cakephp (>= 5.2.0, < 5.2.14)
- cakephp — cakephp (>= 5.3.0, < 5.3.7)

## References

- [CNA](https://github.com/cakephp/cakephp/security/advisories/GHSA-2qh5-382h-3jpc)
- [CNA](https://github.com/cakephp/cakephp/commit/08188962bcd99a95da1e49f62e786f2d688f1e41)
- [CNA](https://github.com/cakephp/cakephp/commit/2afe42b02d8ddc5d442bca5e8bb61910a727646e)
- [CNA](https://github.com/cakephp/cakephp/commit/3e09dae6cbdc983754fa3a8e6aae74da102a3ea1)
- [CNA](https://github.com/cakephp/cakephp/commit/b67b622457362b075bb37e625a82af73a0b3c9c3)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.31%
- **EPSS Percentile:** 23.9

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._