CVE-2026-106488

A flaw was found in plugin-auth-backend-module-oidc-provider. In deployments using email-based identity resolution with an OpenID Connect OIDC provider that allows unverified email addresses, an authenticated attacker can achieve privilege escalation by assuming another catalog identity. This...

EUVD-2026-94007

Backstage: Improper authentication in the OIDC provider...

GHSA-826H-28H9-65HG Backstage: Improper authentication in the OIDC provider

Impact Deployments using OIDC email-based identity resolution with a provider that permits unverified email addresses may allow an authenticated provider user to assume another catalog identity. This may grant access and permissions associated with that user. No direct availability impact is...

@backstage/plugin-auth-backend (>=0.0.0-nightly-20240122021809, <=0.24.4-next.2), @backstage/plugin-auth-backend-module-aws-alb-provider (>=0.0.0-nightly-20240929023448, <=0.4.1-next.2) +1 more potentially affected by CVE-2026-106488 via @backstage/plugin-auth-backend-module-oidc-provider (>=0.0.0-nightly-20240929023448, <=0.4.1-next.2)

@backstage/plugin-auth-backend-module-oidc-provider NPM version =0.0.0-nightly-20240929023448, =0.0.0-nightly-20240122021809, =0.0.0-nightly-20240929023448, =0.2.4-next.2, =0.2.5 Source cves: CVE-2026-106488 Source advisory: OSV:GHSA-826H-28H9-65HG...

@backstage/plugin-auth-backend (>=0.0.0-nightly-20240122021809, <=0.24.4-next.2), @backstage/plugin-auth-backend-module-aws-alb-provider (>=0.0.0-nightly-20240929023448, <=0.4.1-next.2) +1 more potentially affected by CVE-2026-106488 via @backstage/plugin-auth-backend-module-oidc-provider (>=0.0.0-nightly-20240929023448, <=0.4.1-next.2)

@backstage/plugin-auth-backend-module-oidc-provider NPM version =0.0.0-nightly-20240929023448, =0.0.0-nightly-20240122021809, =0.0.0-nightly-20240929023448, =0.2.4-next.2, =0.2.5 Source cves: CVE-2026-106488 Source advisory: GHSA-826H-28H9-65HG...

@backstage/plugin-auth-backend (>=0.0.0-nightly-20240122021809, <=0.24.4-next.2), @backstage/plugin-auth-backend-module-aws-alb-provider (>=0.0.0-nightly-20240929023448, <=0.4.1-next.2) +1 more potentially affected by CVE-2026-106488 via @backstage/plugin-auth-backend-module-oidc-provider (>=0.0.0-nightly-20240929023448, <=0.4.1-next.2)

@backstage/plugin-auth-backend-module-oidc-provider NPM version =0.0.0-nightly-20240929023448, =0.0.0-nightly-20240122021809, =0.0.0-nightly-20240929023448, =0.2.4-next.2, =0.2.5 Source cves: CVE-2026-106488 Source advisory: SNYK:JS-BACKSTAGEPLUGINAUTHBACKENDMODULEOIDCPROVIDER-20826429...

Improper Verification of Cryptographic Signature

Overview @backstage/plugin-auth-backend-module-oidc-provider is a The oidc-provider backend module for the auth plugin. Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature in the oidcAuthenticator within authenticator.ts, where the email claim from...

CVE-2026-106488

Backstage is an open framework for building developer portals. Prior to 0.4.20, the @backstage/plugin-auth-backend-module-oidc-provider package is affected by improper authentication in the oidc provider. Deployments using OIDC email-based identity resolution with a provider that permits unverifi...

CVE-2026-106488 Backstage: Improper authentication in the OIDC provider

Backstage is an open framework for building developer portals. Prior to 0.4.20, the @backstage/plugin-auth-backend-module-oidc-provider package is affected by improper authentication in the oidc provider. Deployments using OIDC email-based identity resolution with a provider that permits unverifi...

CVE-2026-106488 Backstage: Improper authentication in the OIDC provider

Backstage is an open framework for building developer portals. Prior to 0.4.20, the @backstage/plugin-auth-backend-module-oidc-provider package is affected by improper authentication in the oidc provider. Deployments using OIDC email-based identity resolution with a provider that permits unverifi...

CVE-2026-106488 Backstage: Improper authentication in the OIDC provider

Backstage is an open framework for building developer portals. Prior to 0.4.20, the @backstage/plugin-auth-backend-module-oidc-provider package is affected by improper authentication in the oidc provider. Deployments using OIDC email-based identity resolution with a provider that permits unverifi...

@backstage/plugin-auth-backend (>=0.0.0-nightly-20240122021809, <=0.24.4-next.2), @backstage/plugin-auth-backend-module-aws-alb-provider (>=0.0.0-nightly-20240929023448, <=0.4.1-next.2) +1 more potentially affected by CVE-2026-106488 via @backstage/plugin-auth-backend-module-oidc-provider (>=0.0.0-nightly-20240929023448, <=0.4.1-next.2)

@backstage/plugin-auth-backend-module-oidc-provider NPM version =0.0.0-nightly-20240929023448, =0.0.0-nightly-20240122021809, =0.0.0-nightly-20240929023448, =0.2.4-next.2, =0.2.5 Source cves: CVE-2026-106488 Source advisory: MEND:CVE-2026-106488...

CVE-2026-106488

Backstage is an open framework for building developer portals. Prior to 0.4.20, the @backstage/plugin-auth-backend-module-oidc-provider package is affected by improper authentication in the oidc provider. Deployments using OIDC email-based identity resolution with a provider that permits unverifi...

CVE-2026-106488

The Backstage framework is vulnerable to improper authentication in the @backstage/plugin-auth-backend-module-oidc-provider package in versions prior to 0.4.20 . When using OIDC email-based identity resolution with a provider that allows unverified email addresses, an authenticated provider user ...

PT-2026-107269

Name of the Vulnerable Software and Affected Versions Backstage versions prior to 0.4.20 Description The @backstage/plugin-auth-backend-module-oidc-provider package contains improper authentication within the OIDC provider. In deployments utilizing OIDC email-based identity resolution with a...

CVE-2026-106488: Improper Authentication

Backstage is an open framework for building developer portals. Prior to 0.4.20, the @backstage/plugin-auth-backend-module-oidc-provider package is affected by improper authentication in the oidc provider. Deployments using OIDC email-based identity resolution with a provider that permits unverifi...

@backstage/plugin-auth-backend-module-aws-alb-provider (>=0.4.14-next.0, <=0.4.14-next.1), @backstage/plugin-auth-backend-module-oidc-provider (>=0.4.14-next.0, <=0.4.14-next.1) potentially affected by CVE-2026-32236 via @backstage/plugin-auth-backend (>=0.27.1-next.0, <=0.27.1-next.2)

@backstage/plugin-auth-backend NPM version =0.27.1-next.0, =0.4.14-next.0, =0.4.14-next.0, =0.4.14-next.1 Source cves: CVE-2026-32236 Source advisory: SNYK:JS-BACKSTAGEPLUGINAUTHBACKEND-15479717...