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...

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...

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: 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,...

@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-2026-71711

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-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-2026-32236 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: 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-2026-32235 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-2026-32236: Server-Side Request Forgery (SSRF)

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...

PT-2026-25052

Name of the Vulnerable Software and Affected Versions Backstage versions prior to 0.27.1 Description Backstage is an open framework for building developer portals. A Server-Side Request Forgery SSRF issue exists in the @backstage/plugin-auth-backend component when the...

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...