# CVE-2026-34236: Auth0 PHP SDK Insufficient Entropy in Cookie Encryption

> CVE-2026-34236: Auth0 PHP SDK Insufficient Entropy in Cookie Encryption. CVSS 8.2 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-34236
Last updated: 2026-06-17T10:38:42Z

- Published: 2026-04-01 17:04 UTC · Updated: 2026-06-17 10:38 UTC · Assigner: GitHub\_M
- CVSS: 8.2 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
- EPSS: 0.22%, 13th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-331

## Description

Auth0-PHP is a PHP SDK for Auth0 Authentication and Management APIs. From version 8.0.0 to before version 8.19.0, in applications built with the Auth0 PHP SDK, cookies are encrypted with insufficient entropy, which may result in threat actors brute-forcing the encryption key and forging session cookies. This issue has been patched in version 8.19.0.

## Affected vendors and products

- auth0: auth0-PHP

## Tracked companies

- [Auth0](https://rewindex.com/company/auth0.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-34236)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-34236)
- [https://github.com/auth0/auth0-PHP/releases/tag/8.19.0](https://github.com/auth0/auth0-PHP/releases/tag/8.19.0)
- [https://github.com/auth0/auth0-PHP/security/advisories/GHSA-w3wc-44p4-m4j7](https://github.com/auth0/auth0-PHP/security/advisories/GHSA-w3wc-44p4-m4j7)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-34236 · Markdown: https://rewindex.com/cve/CVE-2026-34236.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-34236 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:09:14.208Z