@backstage/plugin-kubernetes (>=0.0.0-nightly-202010102951, <=0.4.2), @devangelista/backstage-scaffolder-kubernetes (>=0.4.0, <=0.5.0) +3 more potentially affected by CVE-2026-106487 via @backstage/plugin-kubernetes-backend (>=0.0.0-nightly-20261031021925, <=0.20.4)

@backstage/plugin-kubernetes-backend NPM version =0.0.0-nightly-20261031021925, =0.0.0-nightly-202010102951, =0.4.0, =1.0.0, =1.1.0, =1.15.1, =2.9.1 Source cves: CVE-2026-106487 Source advisory: OSV:GHSA-H53X-HJX6-25GR...

@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...

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: SNYK:JS-BACKSTAGEPLUGINAUTHBACKENDMODULEOIDCPROVIDER-20826429...

EUVD-2026-94007

Backstage: Improper authentication in the OIDC provider...

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...

@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...

EUVD-2026-94008

Backstage: Improper authorization enforcement for TechDocs static content...

Missing Authorization

Overview @backstage/plugin-techdocs-backend is a The Backstage backend plugin that renders technical documentation for your components Affected versions of this package are vulnerable to Missing Authorization via the /static/docs/:namespace/:kind/:name route handler in router.ts, where an attacke...

GHSA-RG9R-HR7G-5GC2 Backstage: Improper authorization enforcement for TechDocs static content

Impact An authenticated user with access to one TechDocs documentation site could craft a URL able to read documentation belonging to a different entity. This only affects deployments using the external TechDocs builder with an external storage provider S3, GCS, etc. and the permission framework...

EUVD-2026-94009

Backstage: Improper input validation in TechDocs static content requests...

GHSA-7MFX-XG57-53C9 Backstage: Improper input validation in TechDocs static content requests

Impact When using the Azure Blob Storage provider, an authenticated Backstage user may be able to read restricted TechDocs content when entity-level permissions are enabled. Deployments that intentionally disable the default backend authentication policy may have broader exposure. Patches Patched...

Relative Path Traversal

Overview @backstage/plugin-techdocs-backend is a The Backstage backend plugin that renders technical documentation for your components Affected versions of this package are vulnerable to Relative Path Traversal via the /static/docs/:namespace/:kind/:name route handler in router.ts, where the...

Directory Traversal

Overview @backstage/plugin-catalog-backend-module-aws is an A Backstage catalog backend module that helps integrate towards AWS Affected versions of this package are vulnerable to Directory Traversal via the parseUrl functions in AwsS3UrlReader.ts and AzureBlobStorageUrlReader.ts, where URL path...

Directory Traversal

Overview @backstage/plugin-catalog-backend-module-azure is an A Backstage catalog backend module that helps integrate towards Azure Affected versions of this package are vulnerable to Directory Traversal via the parseUrl functions in AwsS3UrlReader.ts and AzureBlobStorageUrlReader.ts, where URL...

Directory Traversal

Overview @backstage/plugin-proxy-backend is an A Backstage backend plugin that helps you set up proxy endpoints in the backend Affected versions of this package are vulnerable to Directory Traversal via the proxy request path handling in router.ts when an attacker sends a request containing .. pa...

EUVD-2026-94010

Backstage: Improper input validation in proxy-backend...

Backstage: Improper preservation of access restrictions during service credential delegation

Impact An external service credential configured with access restrictions e.g., read-only could bypass those restrictions by routing requests through plugin delegation paths. This could allow a restricted service to perform operations beyond its intended scope, including write operations on plugi...

Incorrect Authorization

Overview @backstage/plugin-catalog-backend is a The Backstage backend plugin that provides the Backstage catalog Affected versions of this package are vulnerable to Incorrect Authorization in DefaultCatalogProcessingOrchestrator during catalog processing, where the type field of a registered...

@backstage/backend-dynamic-feature-service (>=0.0.0-nightly-20251122024148, <=0.8.7-next.0), @backstage/plugin-catalog-backend-module-github (>=0.10.1-next.1, <=0.11.1-next.1) +4 more potentially affected by CVE-2026-106496 via @backstage/plugin-catalog-backend (>=3.0.0-next.0, <=3.9.0)

@backstage/plugin-catalog-backend NPM version =3.0.0-next.0, =0.0.0-nightly-20251122024148, =0.10.1-next.1, =0.3.12-next.1, =0.0.0-nightly-20251123025211, =0.1.12-next.1, =0.1.0-next.0, =0.1.3-next.0 Source cves: CVE-2026-106496 Source advisory: OSV:GHSA-PCMQ-25R3-5W9V...