CVE Watch7 oct 2026

CVE-2026-106457

Backstage is an open framework for building developer portals. From 0.1.0 until 0.5.0, the @backstage/plugin-auth-backend-module-cloudflare-

CVSS

6.8

Medio

EPSS

0.3%

p19

KEV

—

Exploit Today

0-100

Publicado: 6 oct 2026 · Última mod.: 7 oct 2026 · CWE-287

EPSS · 30d

0.3%EPSS · 30 días0.3%

2026-10-072026-10-23

Descripción técnica

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.

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