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Vulnerability · Published Aug 24, 2026 · Assigned by GitHub_M

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

Critical 9.1

In plain English

A critical-severity authentication bypass by spoofing in authentication from cakephp. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities).

Severity (CVSS 4.0)9.1Critical
Exploit odds (30 days)0.7%top 46.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Ubuntu:22.04:LTScakephpno fix listedUBUNTU-CVE-2026-77337

Affected products (as reported)

VendorProductVersions
cakephp authentication < 2.11.2>= 3.0.0, < 3.3.7>= 4.0.0, < 4.2.1

Weakness: CWE-290, CWE-770 · Vector: 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

References