CVE-2026-55590

CakePHP: Open redirect weakness via backslash bypass

MEDIUM
6.1
CVSS Score
Published: July 9, 2026 at 06:55 PM UTC
Updated: October 25, 2026 at 05:10 PM UTC
1 product affected across 1 vendorCakephp

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Severity
MEDIUM6.1
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 2.11.13.0.0 ≤ v < 3.3.64.0.0 ≤ v < 4.1.1
Affected range stops below 2.11.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.3.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.1.1, so it looks safe — our inference, not a vendor statement

References (10)

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-601

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