CVE-2026-32236 @backstage/plugin-auth-backend: SSRF in experimental CIMD metadata fetch

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...