CVE-2026-73563

Backstage is an open framework for building developer portals. Prior to 0.29.2, the experimental dynamic client registration and client ID metadata document features in the @backstage/plugin-auth-backend use full-string matcher.isMatch glob matching for...

CVE-2026-73563 Backstage: Unauthenticated OAuth account takeover via `redirect_uri` allowlist bypass in `@backstage/plugin-auth-backend`

Backstage is an open framework for building developer portals. Prior to 0.29.2, the experimental dynamic client registration and client ID metadata document features in the @backstage/plugin-auth-backend use full-string matcher.isMatch glob matching for...

EUVD-2026-58177

Backstage is an open framework for building developer portals. Prior to 0.29.2, the experimental dynamic client registration and client ID metadata document features in the @backstage/plugin-auth-backend use full-string matcher.isMatch glob matching for...

CVE-2026-73563 Backstage: Unauthenticated OAuth account takeover via `redirect_uri` allowlist bypass in `@backstage/plugin-auth-backend`

Backstage is an open framework for building developer portals. Prior to 0.29.2, the experimental dynamic client registration and client ID metadata document features in the @backstage/plugin-auth-backend use full-string matcher.isMatch glob matching for...

CVE-2026-73563 Backstage: Unauthenticated OAuth account takeover via `redirect_uri` allowlist bypass in `@backstage/plugin-auth-backend`

Backstage is an open framework for building developer portals. Prior to 0.29.2, the experimental dynamic client registration and client ID metadata document features in the @backstage/plugin-auth-backend use full-string matcher.isMatch glob matching for...

CVE-2026-73563

Backstage CVE-2026-73563 affects the @backstage/plugin-auth-backend dynamic client registration and CIMD features. Before 0.29.2, full-string glob matching of auth.experimentalDynamicClientRegistration.allowedRedirectUriPatterns and auth.experimentalClientIdMetadataDocuments patterns allowed a ho...

CVE-2026-73563: URL Redirection to Untrusted Site

Backstage is an open framework for building developer portals. Prior to 0.29.2, the experimental dynamic client registration and client ID metadata document features in the @backstage/plugin-auth-backend use full-string matcher.isMatch glob matching for...

@backstage/plugin-auth-backend (>=0.0.0-nightly-20240122021809, <=0.22.11), @backstage/plugin-auth-backend-module-aws-alb-provider (>=0.0.0-nightly-20240126021148, <=0.4.17-next.0) +12 more potentially affected by CVE-2026-73563 via @backstage/plugin-auth-backend (>=0.0.0-nightly-20240929023448, <=0.29.1-next.0)

@backstage/plugin-auth-backend NPM version =0.0.0-nightly-20240929023448, =0.0.0-nightly-20240122021809, =0.0.0-nightly-20240126021148, =0.0.0-nightly-20240122021809, =0.0.0-nightly-202201422556, =0.0.0-nightly-202111222339, =0.0.0-nightly-2021102522541, =0.0.0-nightly-20220203021748,...

Open Redirect

Overview @backstage/plugin-auth-backend is an A Backstage backend plugin that handles authentication Affected versions of this package are vulnerable to Open Redirect via the allowlist matching process. An attacker can intercept authorization codes by registering an OAuth client with a crafted...

@backstage/plugin-auth-backend (>=0.0.0-nightly-20240122021809, <=0.22.11), @backstage/plugin-auth-backend-module-aws-alb-provider (>=0.0.0-nightly-20240126021148, <=0.4.17-next.0) +12 more potentially affected by unknown CVE via @backstage/plugin-auth-backend (>=0.0.0-nightly-20240929023448, <=0.29.1-next.0)

@backstage/plugin-auth-backend NPM version =0.0.0-nightly-20240929023448, =0.0.0-nightly-20240122021809, =0.0.0-nightly-20240126021148, =0.0.0-nightly-20240122021809, =0.0.0-nightly-202201422556, =0.0.0-nightly-202111222339, =0.0.0-nightly-2021102522541, =0.0.0-nightly-20220203021748,...

PT-2026-67470

Impact The allowlist matching used by the experimental dynamic client registration and client ID metadata document CIMD features in @backstage/plugin-auth-backend matched glob patterns against the full URL string. A wildcard could therefore match across URL component boundaries: a pattern such as...

PT-2026-71711

Name of the Vulnerable Software and Affected Versions Backstage versions prior to 0.29.2 Description Experimental dynamic client registration and client ID metadata document features in the @backstage/plugin-auth-backend use full-string matcher.isMatch glob matching for the...

ROOT-APP-NPM-CVE-2026-32236 CVE-2026-32236 in @rootio/backstage__plugin-auth-backend - Patched by Root

Root has patched CVE-2026-32236 in the @rootio/backstageplugin-auth-backend package for Root:npm. Multiple fixed versions available...

CVE-2026-32236

Backstage is an open framework for building developer portals. Prior to 0.27.1, a Server-Side Request Forgery SSRF vulnerability exists in @backstage/plugin-auth-backend when auth.experimentalClientIdMetadataDocuments.enabled is set to true. The CIMD metadata fetch validates the initial clientid...

@backstage/plugin-auth-backend: SSRF in experimental CIMD metadata fetch

Impact A Server-Side Request Forgery SSRF vulnerability exists in @backstage/plugin-auth-backend when auth.experimentalClientIdMetadataDocuments.enabled is set to true. The CIMD metadata fetch validates the initial clientid hostname against private IP ranges but does not apply the same validation...

@backstage/plugin-auth-backend (>=0.0.0-nightly-20240122021809, <=0.22.11), @backstage/plugin-auth-backend-module-aws-alb-provider (>=0.0.0-nightly-20240126021148, <=0.4.13-next.1) +11 more potentially affected by CVE-2026-32236 via @backstage/plugin-auth-backend (>=0.0.0-nightly-20240929023448, <=0.27.0-next.1)

@backstage/plugin-auth-backend NPM version =0.0.0-nightly-20240929023448, =0.0.0-nightly-20240122021809, =0.0.0-nightly-20240126021148, =0.0.0-nightly-20240122021809, =0.0.0-nightly-202201422556, =0.0.0-nightly-202111222339, =0.0.0-nightly-2021102522541, =0.0.0-nightly-20220203021748, =1.0.0,...

@backstage/plugin-auth-backend-module-aws-alb-provider (0.4.13-next.1), @backstage/plugin-auth-backend-module-oidc-provider (0.4.13-next.1) potentially affected by CVE-2026-32236 via @backstage/plugin-auth-backend (0.27.0-next.1)

@backstage/plugin-auth-backend NPM version 0.27.0-next.1 is affected by a known vulnerability. The following packages have a transitive dependency on @backstage/plugin-auth-backend and may be impacted: - @backstage/plugin-auth-backend-module-aws-alb-provider 0.4.13-next.1 -...

@backstage/plugin-auth-backend (>=0.0.0-nightly-20240122021809, <=0.22.11), @backstage/plugin-auth-backend-module-aws-alb-provider (>=0.0.0-nightly-20240126021148, <=0.4.13-next.1) +11 more potentially affected by CVE-2026-32235 via @backstage/plugin-auth-backend (>=0.0.0-nightly-20240929023448, <=0.27.0-next.1)

@backstage/plugin-auth-backend NPM version =0.0.0-nightly-20240929023448, =0.0.0-nightly-20240122021809, =0.0.0-nightly-20240126021148, =0.0.0-nightly-20240122021809, =0.0.0-nightly-202201422556, =0.0.0-nightly-202111222339, =0.0.0-nightly-2021102522541, =0.0.0-nightly-20220203021748, =1.0.0,...

@backstage/plugin-auth-backend (>=0.0.0-nightly-20240122021809, <=0.22.11), @backstage/plugin-auth-backend-module-aws-alb-provider (>=0.0.0-nightly-20240126021148, <=0.4.13-next.1) +11 more potentially affected by CVE-2026-32235 via @backstage/plugin-auth-backend (>=0.0.0-nightly-20240929023448, <=0.27.0-next.1)

@backstage/plugin-auth-backend NPM version =0.0.0-nightly-20240929023448, =0.0.0-nightly-20240122021809, =0.0.0-nightly-20240126021148, =0.0.0-nightly-20240122021809, =0.0.0-nightly-202201422556, =0.0.0-nightly-202111222339, =0.0.0-nightly-2021102522541, =0.0.0-nightly-20220203021748, =1.0.0,...

CVE-2026-32235: URL Redirection to Untrusted Site

Backstage is an open framework for building developer portals. Prior to 0.27.1, the experimental OIDC provider in @backstage/plugin-auth-backend is vulnerable to a redirect URI allowlist bypass. Instances that have enabled experimental Dynamic Client Registration or Client ID Metadata Documents a...