What’s Vulnerable › Vulnerabilities

CVE-2026-55590: CakePHP: Open redirect weakness via backslash bypass

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-09 · updated 2026-10-25
• Weakness: CWE-601

Description

CakePHP Authentication is an authentication plugin for CakePHP that can also be used in PSR-7 based applications. Prior to 2.11.1, 3.3.6, and 4.1.1, the getLoginRedirect() method contains a weakness to backslash bypasses that allows redirect targets with attacker-controlled hostnames through the redirect query string parameter. This issue is fixed in versions 2.11.1, 3.3.6, and 4.1.1.

Affected products

• cakephp: before 2.11.1; from 3.0.0 before 3.3.6; from 4.0.0 before 4.1.1 — fixed in 2.11.1, 3.3.6, 4.1.1

How to fix

Upgrade to a fixed version: cakephp 2.11.1, 3.3.6, 4.1.1. Check the vendor advisory for mitigations.

References

• https://github.com/cakephp/authentication/commit/1c1e29c7e8129cfbcae74558316ecd3ea50a8273
• https://github.com/cakephp/authentication/commit/df28ea4e712f1e5bd0e42be4a3c5c750ca50764d
• https://github.com/cakephp/authentication/commit/ee24bd48b9c3ef693dc9965de8f0cc8020a7052c
• https://github.com/cakephp/authentication/pull/795
• https://github.com/cakephp/authentication/pull/796
• https://github.com/cakephp/authentication/pull/799
• https://github.com/cakephp/authentication/releases/tag/2.11.1
• https://github.com/cakephp/authentication/releases/tag/3.3.6
• https://github.com/cakephp/authentication/releases/tag/4.1.1
• https://github.com/cakephp/authentication/security/advisories/GHSA-hhpq-7wg4-36jm

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