Staging Environment: Content and features may be unstable or change without notice.
Search for vulnerabilities
Vulnerability details: VCID-mwey-ne6v-bkea
Vulnerability ID VCID-mwey-ne6v-bkea
Aliases CVE-2026-42280
GHSA-8qjv-jj2q-x832
Summary Auth.js SDK has Improper Permission Checking ### Description Under specific preconditions, the Auth0.js SDK may improperly return user profile information using a valid access token when a specifically crafted invalid ID token is provided. ### Am I Affected? Users are affected if they meet each of the following preconditions: - Applications built using Auth0.js version between 8.11.0 and 9.32.0 - The application’s access control relies on rules defined in Auth0 Actions. ### Affected product and versions auth0.js SDK v8.11.0 to v9.32.0 ### Resolution Upgrade auth0/auth0.js to v10.0.0 or greater. ### Acknowledgements Okta would like to thank Quan Le (@aleister1102) for their discovery and responsible disclosure.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-863 Incorrect Authorization
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 0.00043 https://api.first.org/data/v1/epss?cve=CVE-2026-42280
epss 0.00043 https://api.first.org/data/v1/epss?cve=CVE-2026-42280
epss 0.00043 https://api.first.org/data/v1/epss?cve=CVE-2026-42280
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-8qjv-jj2q-x832
cvssv3.1 7.1 https://github.com/auth0/auth0.js
generic_textual HIGH https://github.com/auth0/auth0.js
cvssv3.1 7.1 https://github.com/auth0/auth0.js/security/advisories/GHSA-8qjv-jj2q-x832
cvssv3.1_qr HIGH https://github.com/auth0/auth0.js/security/advisories/GHSA-8qjv-jj2q-x832
generic_textual HIGH https://github.com/auth0/auth0.js/security/advisories/GHSA-8qjv-jj2q-x832
ssvc Track https://github.com/auth0/auth0.js/security/advisories/GHSA-8qjv-jj2q-x832
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2026-42280
https://github.com/auth0/auth0.js
https://github.com/auth0/auth0.js/security/advisories/GHSA-8qjv-jj2q-x832
CVE-2026-42280 https://nvd.nist.gov/vuln/detail/CVE-2026-42280
GHSA-8qjv-jj2q-x832 https://github.com/advisories/GHSA-8qjv-jj2q-x832
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N Found at https://github.com/auth0/auth0.js
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:L/PR:L/UI:N/S:U/C:H/I:L/A:N Found at https://github.com/auth0/auth0.js/security/advisories/GHSA-8qjv-jj2q-x832
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:P/P:M/B:A/M:M/D:T/2026-05-28T15:36:47Z/ Found at https://github.com/auth0/auth0.js/security/advisories/GHSA-8qjv-jj2q-x832
Exploit Prediction Scoring System (EPSS)
Percentile 0.13493
EPSS Score 0.00043
Published At June 5, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-04T17:04:24.887689+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-8qjv-jj2q-x832/GHSA-8qjv-jj2q-x832.json 38.6.0