Auth0 PHP SDK Insufficient Entropy in Cookie Encryption

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-34236
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-01 18:16:30 UTC
Updated2026-04-07 20:20:35 UTC
DescriptionAuth0-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.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.000110000 probability, percentile 0.013100000 (date 2026-04-07)

Problem Types: CWE-331 | CWE-331 CWE-331: Insufficient Entropy

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1[email protected]Secondary8.2HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
3.1CNADECLARED8.2HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Auth0 Auth0-php All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Auth0 Auth0-PHP affected >= 8.0.0, < 8.19.0 Not specified

References

ReferenceSourceLinkTags
github.com/auth0/auth0-PHP/releases/tag/8.19.0 [email protected] github.com Product, Release Notes
github.com/auth0/auth0-PHP/security/advisories/GHSA-w3wc-44p4-m4j7 [email protected] github.com Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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