# CVE-2026-77337

## Summary

- **CVE ID:** CVE-2026-77337
- **Severity:** CRITICAL
- **CVSS Score:** 9.1 (CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-290, CWE-770
- **Published:** Aug 24, 2026
- **Last Modified:** Aug 25, 2026

## Description

CakePHP Authentication is an authentication plugin for CakePHP that can also be used in PSR-7 based applications. Versions before 2.11.2, from 3.0.0 through 3.3.6, and from 4.0.0 through 4.2.0 allow authentication bypass and potential CPU or memory exhaustion when CookieAuthenticator uses unencrypted, forgeable legacy tokens. This issue is fixed in versions 2.11.2, 3.3.7, and 4.2.1.

## Affected Products

- cakephp — authentication (< 2.11.2)
- cakephp — authentication (>= 3.0.0, < 3.3.7)
- cakephp — authentication (>= 4.0.0, < 4.2.1)

## References

- [CNA](https://github.com/cakephp/authentication/security/advisories/GHSA-h7xh-9h2x-2m37)
- [CNA](https://github.com/cakephp/authentication/pull/806)
- [CNA](https://github.com/cakephp/authentication/pull/807)
- [CNA](https://github.com/cakephp/authentication/commit/c94d9a5380e7f4fdf38d338a9de2223a5b087159)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.39%
- **EPSS Percentile:** 32.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-19._