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Vulnerability details: VCID-yp9u-s51c-rbfx
Vulnerability ID VCID-yp9u-s51c-rbfx
Aliases CVE-2026-34236
GHSA-w3wc-44p4-m4j7
Summary Auth0 PHP SDK has Insufficient Entropy in Cookie Encryption ### Impact 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. ### Am I Affected? Consumers are affected if their application meets the following preconditions: - Their application is using the Auth0-PHP SDK, versions between 8.0.0 and 8.18.0 - Their application is using the Auth0-PHP SDK, or the following SDKs that rely on the Auth0-PHP SDK: - Auth0/symfony, - Auth0/laravel0-auth0, or - Auth0/wordpress ### Resolution Upgrade Auth0/Auth0-PHP to version 8.19.0 or greater.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-331 Insufficient Entropy
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00014 https://api.first.org/data/v1/epss?cve=CVE-2026-34236
epss 0.00014 https://api.first.org/data/v1/epss?cve=CVE-2026-34236
epss 0.00014 https://api.first.org/data/v1/epss?cve=CVE-2026-34236
epss 0.00016 https://api.first.org/data/v1/epss?cve=CVE-2026-34236
epss 0.00016 https://api.first.org/data/v1/epss?cve=CVE-2026-34236
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-w3wc-44p4-m4j7
cvssv3.1 8.2 https://github.com/auth0/auth0-PHP
generic_textual HIGH https://github.com/auth0/auth0-PHP
cvssv3.1 8.2 https://github.com/auth0/auth0-PHP/releases/tag/8.19.0
generic_textual HIGH https://github.com/auth0/auth0-PHP/releases/tag/8.19.0
ssvc Track https://github.com/auth0/auth0-PHP/releases/tag/8.19.0
cvssv3.1 8.2 https://github.com/auth0/auth0-PHP/security/advisories/GHSA-w3wc-44p4-m4j7
cvssv3.1_qr HIGH https://github.com/auth0/auth0-PHP/security/advisories/GHSA-w3wc-44p4-m4j7
generic_textual HIGH https://github.com/auth0/auth0-PHP/security/advisories/GHSA-w3wc-44p4-m4j7
ssvc Track https://github.com/auth0/auth0-PHP/security/advisories/GHSA-w3wc-44p4-m4j7
cvssv3.1 8.2 https://nvd.nist.gov/vuln/detail/CVE-2026-34236
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2026-34236
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2026-34236
https://github.com/auth0/auth0-PHP
https://github.com/auth0/auth0-PHP/releases/tag/8.19.0
https://github.com/auth0/auth0-PHP/security/advisories/GHSA-w3wc-44p4-m4j7
https://nvd.nist.gov/vuln/detail/CVE-2026-34236
GHSA-w3wc-44p4-m4j7 https://github.com/advisories/GHSA-w3wc-44p4-m4j7
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N Found at https://github.com/auth0/auth0-PHP
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N Found at https://github.com/auth0/auth0-PHP/releases/tag/8.19.0
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2026-04-01T17:59:49Z/ Found at https://github.com/auth0/auth0-PHP/releases/tag/8.19.0
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N Found at https://github.com/auth0/auth0-PHP/security/advisories/GHSA-w3wc-44p4-m4j7
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2026-04-01T17:59:49Z/ Found at https://github.com/auth0/auth0-PHP/security/advisories/GHSA-w3wc-44p4-m4j7
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2026-34236
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.02733
EPSS Score 0.00014
Published At June 5, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-04T16:52:34.704269+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-w3wc-44p4-m4j7/GHSA-w3wc-44p4-m4j7.json 38.6.0