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CVE-2026-77337— CakePHP: Potential Authentication bypass with CookieAuthenticator

Quick assessment

Affected
cakephp authentication
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

CakePHP Authentication 是 CakePHP 的一个身份验证插件，也可用于基于 PSR-7 的应用程序。在 2.11.2 之前的版本、3.0.0 至 3.3.6 版本以及 4.0.0 至 4.2.0 版本中，当 CookieAuthenticator 使用未加密且可伪造的旧版令牌时，可能导致身份验证绕过，并可能引发 CPU 或内存耗尽问题。该问题已在 2.11.2、3.3.7 和 4.2.1 版本中修复。

CVSS 9.1 · Critical EPSS 0.39% · P32

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

Affected Version Matrix 3

VendorProduct Version RangeStatus
cakephp authentication < 2.11.2 affected
>= 3.0.0, < 3.3.7 affected
>= 4.0.0, < 4.2.1 affected
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I. Basic Information for CVE-2026-77337

Vulnerability Information
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Vulnerability Title
CakePHP: Potential Authentication bypass with CookieAuthenticator
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
使用欺骗进行的认证绕过
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
cakephp authentication < 2.11.2 -

II. Public POCs for CVE-2026-77337

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 10161 chars
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III. Intelligence Information for CVE-2026-77337

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Patches & Fixes for CVE-2026-77337 (2)

Vendor Advisories for CVE-2026-77337 (1)

Same Patch Batch · cakephp · 2026-08-24 · 3 CVEs total

CVE-2026-77635 9.2 CRITICAL CakePHP: FunctionsBuilder::jsonValue() vulerable to SQL injection with PostgresDriver
CVE-2026-77634 8.2 HIGH CakePHP: SmtpTransport vulnerable to CRLF header injection

IV. Related Vulnerabilities

Same product: authentication
Same vendor: cakephp
Same weakness: CWE-290

V. Comments for CVE-2026-77337

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