CVE-2026-106457

The record

Backstage is an open framework for building developer portals. From 0.1.0 until 0.5.0, the @backstage/plugin-auth-backend-module-cloudflare-access-provider package is affected by insufficient audience validation in the cloudflare access auth provider. The Cloudflare Access auth provider verifies a token's signature and team issuer, but affected versions do not verify that the token was issued for the Backstage application. A user holding a valid token for another Access application in the same Cloudflare Zero Trust team may therefore be able to authenticate to Backstage if that token reaches the auth endpoint without the Backstage application's audience already being enforced upstream. Cloudflare Access normally evaluates the protected application before forwarding requests. This issue is fixed in version 0.5.0.

Affected packages

Related vulnerabilities

• CVE-2026-63398 Coop is an open source review and moderation tool from ROOST. CWE-287
• CVE-2026-116239 In server mode pgAdmin 4 keeps an account per authentication source, so the same username… CWE-287
• CVE-2026-62264 PDF Reader MCP is a Model Context Protocol server for reading PDF documents. CWE-287
• CVE-2026-61739 SOCFortress CoPilot focuses on providing a single pane of glass for all your security… CWE-287
• CVE-2026-110799 Vvveb is a powerful and easy to use CMS with page builder to build websites, blogs or… CWE-287
• CVE-2026-119572 Traefik from 3.7.0-ea.1 before 3.7.15 contains an authentication bypass vulnerability in… CWE-287
• CVE-2026-118194 The Page and Post Restriction plugin for WordPress is vulnerable to Authentication Bypass… CWE-287
• CVE-2026-114443 The Security Plugin, Firewall & Malware Scanner with Auto Removal WordPress plugin before… CWE-287