@backstage/plugin-auth-backend (>=0.0.0-nightly-20250225023230, <=0.24.5), @backstage/plugin-auth-backend-module-aws-alb-provider (>=0.0.0-nightly-20250225023230, <=0.4.2) +2 more potentially affected by CVE-2026-106457 via @backstage/plugin-auth-backend-module-cloudflare-access-provider (>=0.1.6-next.2, <=0.4.18)

@backstage/plugin-auth-backend-module-cloudflare-access-provider NPM version =0.1.6-next.2, =0.0.0-nightly-20250225023230, =0.0.0-nightly-20250225023230, =0.0.0-nightly-20250225023230, =0.4.2 - @jiteshy/backstage-plugin-synergy-backend 1.2.2 Source cves: CVE-2026-106457 Source advisory:...

@backstage/plugin-auth-backend (>=0.0.0-nightly-20250225023230, <=0.24.5), @backstage/plugin-auth-backend-module-aws-alb-provider (>=0.0.0-nightly-20250225023230, <=0.4.2) +2 more potentially affected by CVE-2026-106457 via @backstage/plugin-auth-backend-module-cloudflare-access-provider (>=0.1.6-next.2, <=0.4.18)

@backstage/plugin-auth-backend-module-cloudflare-access-provider NPM version =0.1.6-next.2, =0.0.0-nightly-20250225023230, =0.0.0-nightly-20250225023230, =0.0.0-nightly-20250225023230, =0.4.2 - @jiteshy/backstage-plugin-synergy-backend 1.2.2 Source cves: CVE-2026-106457 Source advisory:...

Backstage: Insufficient audience validation in the Cloudflare Access auth provider

Impact 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...

EUVD-2026-93990

Backstage: Insufficient audience validation in the Cloudflare Access auth provider...

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...

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-2026-106457

Backstage is an open framework for building developer portals. From 0.1.0 until 0.5.0, the @backstage/plugin-auth-backend-module-cloudflare-access-provider package is affected by insufficient audience validation in the cloudflare access auth provider. The Cloudflare Access auth provider verifies ...

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 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: 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

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 ...

CVE-2026-106457 Backstage: Insufficient audience validation in the Cloudflare Access auth provider

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 ...

CVE-2026-106457 Backstage: Insufficient audience validation in the Cloudflare Access auth provider

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 ...

@backstage/plugin-auth-backend (>=0.0.0-nightly-20250225023230, <=0.24.5), @backstage/plugin-auth-backend-module-aws-alb-provider (>=0.0.0-nightly-20250225023230, <=0.4.2) +2 more potentially affected by CVE-2026-106457 via @backstage/plugin-auth-backend-module-cloudflare-access-provider (>=0.1.6-next.2, <=0.4.18)

@backstage/plugin-auth-backend-module-cloudflare-access-provider NPM version =0.1.6-next.2, =0.0.0-nightly-20250225023230, =0.0.0-nightly-20250225023230, =0.0.0-nightly-20250225023230, =0.4.2 - @jiteshy/backstage-plugin-synergy-backend 1.2.2 Source cves: CVE-2026-106457 Source advisory:...

CVE-2026-106457 Backstage: Insufficient audience validation in the Cloudflare Access auth provider

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 ...