CVE-2026-40155 — The Auth0 Next.js SDK is a library for implementing user
CVE-2026-40155 — The Auth0 Next.js SDK is a library for implementing user authentication in Next.js applications. In versions 4.12.0 through 4.17.1, simultaneous requests that trigger a nonce retry may cause the proxy cache fetcher to perform improper lookups for the token request results. Users are
What This Means For You
- If your environment is affected by CWE-362, CWE-863, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-40155 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
2 rules · 6 SIEM formats2 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
Auth0 Next.js SDK Improper Lookup for Token Request - CVE-2026-40155
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-40155 | vulnerability | CVE-2026-40155 |
| CWE-362 | weakness | CWE-362 |
| CWE-863 | weakness | CWE-863 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | April 18, 2026 at 00:16 UTC |
This content was curated and summarized by Shimi's Cyber World for informational purposes. It is not copied or republished in full. All intellectual property rights remain with the original author and source.
Believe this infringes your rights? Submit a takedown request.
Related Posts
Critical Thymeleaf Vulnerability Bypasses Injection Protections
CVE-2026-40478 — Thymeleaf is a server-side Java template engine for web and standalone environments. Versions 3.1.3.RELEASE and prior contain a security bypass vulnerability in the...
Critical Thymeleaf Vulnerability Bypasses Injection Protections
CVE-2026-40477 — Thymeleaf is a server-side Java template engine for web and standalone environments. Versions 3.1.3.RELEASE and prior contain a security bypass vulnerability in the...
wger Fitness Manager: Auth Bypass Grants Global Config Control
CVE-2026-40474 — wger is a free, open-source workout and fitness manager. In versions 2.5 and below, the GymConfigUpdateView declares permission_required = 'config.change_gymconfig' but inherits WgerFormMixin...