CVE-2026-42280

Description

Auth.js SDK has Improper Permission Checking

Description (MITRE) cveawg.mitre.org

Pulled from cveawg.mitre.org/api/cve/CVE-2026-42280 on 2026-07-28. Shown when MITRE's text differs from the cvelistV5 mirror.

Auth0.js is a client-side JavaScript library for Auth0. From 8.11.0 to 9.32.0, 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. This vulnerability is fixed in 10.0.0.

Overview

State

—

Assigner (CNA)

—

CVSS severity

high

CVSS score

7.1 / 10

CVSS vector

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

Effective score

7.1 / 10 HIGH source: CNA overview

CWE(s)

—

Reserved

—

Published

—

Last updated

—

Source

https://www.tenable.com/cve/CVE-2026-42280

Linked Threat

CVE-2026-42280 — CVE-2026-42280

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID

EUVD-2026-32533

Assigner

GitHub_M

Published

May 27, 2026, 2:39:15 PM

Updated

May 28, 2026, 3:36:56 PM

EUVD base score (CVSS 3.1)

7.1 / 10
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

EUVD-reported EPSS

0.2100

Vendors

auth0

Products

auth0.js (8.11.0 , ≤ 9.32.0)

Aliases

GHSA-8qjv-jj2q-x832

ENISA description: Auth0.js is a client-side JavaScript library for Auth0. From 8.11.0 to 9.32.0, 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. This vulnerability is fixed in 10.0.0.

Vendor references (0)

References embedded in the original CVE record by the assigning CNA.

None in the CVE record.

Web references (4)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

• https://github.com/auth0/auth0.js/security/advisories/GHSA-8qjv-jj2q-x832 tenable:github.com
• https://www.first.org/epss/ tenable:www.first.org
• https://nvd.nist.gov/vuln/detail/CVE-2026-42280 tenable:nvd.nist.gov
• https://www.cve.org/CVERecord?id=CVE-2026-42280 tenable:www.cve.org

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

• Microsoft Patch Tuesday April 2026 - 168 Vulnerabilities Fixed ...
  web:cybersecuritynews.com

  Microsoft has released its April 2026 Patch Tuesday security update, addressing 168 vulnerabilities across its product portfolio including one actively exploited zero-day and one publicly disclosed flaw that organizations must prioritize immediately.

  2026-05-26 02:48 UTC
• Nvd - Cve-2026-42826
  web:nvd.nist.gov

  An official website of the United States government Here's how you know

  2026-05-26 02:48 UTC
• Security Update Guide - Microsoft
  web:portal.msrc.microsoft.com

  The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

  2026-05-26 02:48 UTC
• Microsoft Patches 138 Vulnerabilities, Including DNS and Netlogon RCE Flaws
  web:thehackernews.com

  Microsoft patched 138 flaws, including 30 Critical bugs, as AI discovery expands Patch Tuesday risk.

  2026-05-26 02:48 UTC
• CVE-2026-42280: Auth0.js SDK Improper Permission Checking Vulnerability
  web:vulert.com

  Learn about CVE-2026-42280 , a vulnerability in Auth0.js SDK that allows improper permission checking, and how to fix it by upgrading to version 10.0.0 or greater.

  2026-05-26 02:48 UTC
• Microsoft March 2026 Patch Tuesday fixes 2 zero-days, 79 flaws
  web:www.bleepingcomputer.com

  Today is Microsoft's March 2026 Patch Tuesday with security updates for 79 flaws, including 2 publicly disclosed zero-day vulnerabilities.

  2026-05-26 02:48 UTC
• April 2026 Patch Tuesday: Updates and Analysis | CrowdStrike
  web:www.crowdstrike.com

  Microsoft's April 2026 Patch Tuesday addresses 164 CVEs , featuring 8 Critical vulnerabilities, one exploited zero-day, and one disclosed zero-day.

  2026-05-26 02:48 UTC
• Oracle Critical Patch Update Advisory - April 2026
  web:www.oracle.com

  This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.

  2026-05-26 02:48 UTC
• Windows 11 April 2026 Update tested: What's new, improved and fixed
  web:www.windowslatest.com

  Windows 11 April 2026 update adds Narrator Copilot support, faster Settings, File Explorer fixes, and key security improvements.

  2026-05-26 02:48 UTC
• Patch Tuesday May 2026: Security Updates & CVE Analysis
  web:zecurit.com

  Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

  2026-05-26 02:48 UTC

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