# CVE-2026-77337 — cakephp authentication

> As of 2026-08-24, CVE-2026-77337 is a Critical-severity (band derived from the CVSS v4.0 score, not stated by the CNA) vulnerability in cakephp authentication, CVSS v4.0 9.1, EPSS 0.3% (31.6th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-77337 as of 2026-08-24; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-08-24

## What is CVE-2026-77337?

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.

The record classifies CVE-2026-77337 under weakness classes [CWE-290](https://intel.threadlinqs.com/cwe/CWE-290), [CWE-770](https://intel.threadlinqs.com/cwe/CWE-770). 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 42 days ago.

## Severity and exploitation probability

- **CVSS v4.0 base score:** 9.1 — Critical (derived from score) (`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`)
- **EPSS (FIRST):** 0.3% probability of exploitation in the next 30 days, higher than 31.6% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 5.8/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-08-24

## Is CVE-2026-77337 being exploited?

It currently carries a trending score of 38 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **cakephp**: authentication

## How to fix CVE-2026-77337

No vendor patch reference has been recorded for CVE-2026-77337 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-77337

No threat campaign in the Threadlinqs corpus currently references CVE-2026-77337, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, NVD, FIRST EPSS. Last verified by Threadlinqs on 2026-08-25. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [github.com](https://github.com/cakephp/authentication/security/advisories/GHSA-h7xh-9h2x-2m37)

**Other references**

- [github.com](https://github.com/cakephp/authentication/pull/806)
- [github.com (807)](https://github.com/cakephp/authentication/pull/807)
- [github.com (c94d9a5380e7f4fdf38d338a9de2223a5b087159)](https://github.com/cakephp/authentication/commit/c94d9a5380e7f4fdf38d338a9de2223a5b087159)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-77337
Full detection coverage and IOCs for threats exploiting CVE-2026-77337 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp