{"items":[{"id":"NVI-00015228","kind":"vulnerability","title":"@backstage/plugin-auth-backend: Unauthenticated OAuth account takeover via `redirect_uri` allowlist bypass","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-38hq-7x33-php4","CVE-2026-73563"],"plain_summary":"GitHub lists this reviewed advisory for @backstage/plugin-auth-backend. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-045cf2d26ab4d2a98bb933e0e4353eca"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-08-13T17:32:47.000Z","value":"4.7 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-44d862633af318cfeb7ce3db5ef73164"},{"kind":"CVSS","as_of":"2026-10-15T20:37:36.210Z","value":"4.7 MEDIUM (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-045cf2d26ab4d2a98bb933e0e4353eca"},{"kind":"CVSS","as_of":"2026-10-15T20:37:36.210Z","value":"6.1 MEDIUM (3.1)","meaning":"nvd@nist.gov severity; no combined Null risk score.","source_id":"sr-045cf2d26ab4d2a98bb933e0e4353eca"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-44d862633af318cfeb7ce3db5ef73164","url":"https://github.com/advisories/GHSA-38hq-7x33-php4","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-38hq-7x33-php4","publisher":"GitHub Advisory Database","observed_at":"2026-11-02T20:16:47.162Z"},{"id":"sr-045cf2d26ab4d2a98bb933e0e4353eca","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-73563","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-73563","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-08T19:45:24.870Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-44d862633af318cfeb7ce3db5ef73164"],"technology":"@backstage/plugin-auth-backend","known_exclusions":[],"conditions_summary":"### Impact\nThe 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 `https://*.example.com/callback`, intended to allow subdomains of a trusted host, would also match an attacker-controlled URL such as `https://attacker.example/x.example.com/callback`. This applies to `auth.experimentalDynamicClientRegistration.allowedRedirectUriPatterns` as well as the `allowedClientIdPatterns` and `allowedRedirectUriPatterns` options of `auth.experimentalClientIdMetadataDocuments`.\n\nAn attacker could use this to register an OAuth client whose redirect URI points to a host they control while still passing the allowlist, causing authorization codes to be delivered to the attacker when a victim completes an authorization flow. In addition, allowlist patterns without an explicit protocol could match URLs with any protocol, and redirect URIs containing embedded credentials (user:pass@host) were accepted after the credentials were stripped for matching.\n\nThe practica","public_affected_ranges":["<= 0.29.1"]}],"null_published_at":"2026-11-08T19:53:44.016Z","source_updated_at":"2026-08-13T17:32:47.000Z","source_disclosed_at":"2026-07-24T16:20:59.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-11-02T20:16:47.162Z"},{"id":"NVI-00015228","kind":"vulnerability","title":"@backstage/plugin-auth-backend: Unauthenticated OAuth account takeover via `redirect_uri` allowlist bypass","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-38hq-7x33-php4","CVE-2026-73563"],"plain_summary":"GitHub lists this reviewed advisory for @backstage/plugin-auth-backend. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-44d862633af318cfeb7ce3db5ef73164"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-08-13T17:32:47.000Z","value":"4.7 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-44d862633af318cfeb7ce3db5ef73164"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-44d862633af318cfeb7ce3db5ef73164","url":"https://github.com/advisories/GHSA-38hq-7x33-php4","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-38hq-7x33-php4","publisher":"GitHub Advisory Database","observed_at":"2026-11-02T20:16:47.162Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-44d862633af318cfeb7ce3db5ef73164"],"technology":"@backstage/plugin-auth-backend","known_exclusions":[],"conditions_summary":"### Impact\nThe 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 `https://*.example.com/callback`, intended to allow subdomains of a trusted host, would also match an attacker-controlled URL such as `https://attacker.example/x.example.com/callback`. This applies to `auth.experimentalDynamicClientRegistration.allowedRedirectUriPatterns` as well as the `allowedClientIdPatterns` and `allowedRedirectUriPatterns` options of `auth.experimentalClientIdMetadataDocuments`.\n\nAn attacker could use this to register an OAuth client whose redirect URI points to a host they control while still passing the allowlist, causing authorization codes to be delivered to the attacker when a victim completes an authorization flow. In addition, allowlist patterns without an explicit protocol could match URLs with any protocol, and redirect URIs containing embedded credentials (user:pass@host) were accepted after the credentials were stripped for matching.\n\nThe practica","public_affected_ranges":["<= 0.29.1"]}],"null_published_at":"2026-11-03T10:03:26.563Z","source_updated_at":"2026-08-13T17:32:47.000Z","source_disclosed_at":"2026-07-24T16:20:59.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-02T20:16:47.162Z"}],"next_cursor":null,"snapshot_revision":"42594"}