{"items":[{"id":"NVI-00012018","kind":"vulnerability","title":"Backstage: Insufficient audience validation in the Cloudflare Access auth provider","revision":3,"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-q333-f498-w2x7","CVE-2026-106457"],"plain_summary":"GitHub lists this reviewed advisory for @backstage/plugin-auth-backend-module-cloudflare-access-provider. 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-24f982f794f6cf2f886cabbc1561eb56"],"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":"2026-10-07T20:25:28.000Z","value":"6.8 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-89fecdf985db46d412a5af7aebadd160"},{"kind":"CVSS","as_of":"2026-10-27T20:48:50.790Z","value":"6.8 MEDIUM (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-0a1644cbe2b179d849e7ce095404948e"},{"kind":"CVSS","as_of":"2026-10-27T20:48:50.790Z","value":"8.1 HIGH (3.1)","meaning":"nvd@nist.gov severity; no combined Null risk score.","source_id":"sr-0a1644cbe2b179d849e7ce095404948e"},{"kind":"EPSS","as_of":"2026-11-01T12:00:16.000Z","value":"0.281%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.20635. Missing scores are unknown.","source_id":"sr-24f982f794f6cf2f886cabbc1561eb56"}],"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-89fecdf985db46d412a5af7aebadd160","url":"https://github.com/advisories/GHSA-q333-f498-w2x7","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-q333-f498-w2x7","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T00:58:46.232Z"},{"id":"sr-0a1644cbe2b179d849e7ce095404948e","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-106457","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-106457","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-03T09:58:21.903Z"},{"id":"sr-24f982f794f6cf2f886cabbc1561eb56","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-106457","publisher":"FIRST EPSS","observed_at":"2026-11-01T14:28:32.263Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-89fecdf985db46d412a5af7aebadd160"],"technology":"@backstage/plugin-auth-backend-module-cloudflare-access-provider","known_exclusions":[],"conditions_summary":"### Impact\n\nThe Cloudflare Access auth provider verifies a token's signature and team issuer, but affected versions do not verify that the token was issued for the Backstage application. A user holding a valid token for another Access application in the same Cloudflare Zero Trust team may therefore be able to authenticate to Backstage if that token reaches the auth endpoint without the Backstage application's audience already being enforced upstream.\n\nCloudflare Access normally evaluates the protected application before forwarding requests. The reported reproduction exercises the provider directly and does not demonstrate bypass through the ordinary Cloudflare-protected Backstage URL. Relevant deployment topologies include direct origin access, alternate routes around the intended Access application, or another proxy forwarding the assertion unchanged.\n\nA successful sign-in also depends on the deployment's sign-in resolver mapping the presented identity to a Backstage user. The resulting impact depends on the permissions assigned to that identity.\n\n### Patches\n\nUpgrade `@backstage/plugin-auth-backend-module-cloudflare-access-provider` to version `0.5.0` or later. The fixed package ","public_affected_ranges":[">= 0.1.0, < 0.5.0"]}],"null_published_at":"2026-11-04T18:04:03.192Z","source_updated_at":"2026-10-07T20:25:28.000Z","source_disclosed_at":"2026-10-07T20:25:25.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-11-01T00:58:46.232Z"},{"id":"NVI-00012018","kind":"vulnerability","title":"Backstage: Insufficient audience validation in the Cloudflare Access auth provider","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-q333-f498-w2x7","CVE-2026-106457"],"plain_summary":"GitHub lists this reviewed advisory for @backstage/plugin-auth-backend-module-cloudflare-access-provider. 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-0a1644cbe2b179d849e7ce095404948e"],"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":"2026-10-07T20:25:28.000Z","value":"6.8 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-89fecdf985db46d412a5af7aebadd160"},{"kind":"CVSS","as_of":"2026-10-27T20:48:50.790Z","value":"6.8 MEDIUM (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-0a1644cbe2b179d849e7ce095404948e"},{"kind":"CVSS","as_of":"2026-10-27T20:48:50.790Z","value":"8.1 HIGH (3.1)","meaning":"nvd@nist.gov severity; no combined Null risk score.","source_id":"sr-0a1644cbe2b179d849e7ce095404948e"}],"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-89fecdf985db46d412a5af7aebadd160","url":"https://github.com/advisories/GHSA-q333-f498-w2x7","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-q333-f498-w2x7","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T00:58:46.232Z"},{"id":"sr-0a1644cbe2b179d849e7ce095404948e","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-106457","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-106457","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-03T09:58:21.903Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-89fecdf985db46d412a5af7aebadd160"],"technology":"@backstage/plugin-auth-backend-module-cloudflare-access-provider","known_exclusions":[],"conditions_summary":"### Impact\n\nThe Cloudflare Access auth provider verifies a token's signature and team issuer, but affected versions do not verify that the token was issued for the Backstage application. A user holding a valid token for another Access application in the same Cloudflare Zero Trust team may therefore be able to authenticate to Backstage if that token reaches the auth endpoint without the Backstage application's audience already being enforced upstream.\n\nCloudflare Access normally evaluates the protected application before forwarding requests. The reported reproduction exercises the provider directly and does not demonstrate bypass through the ordinary Cloudflare-protected Backstage URL. Relevant deployment topologies include direct origin access, alternate routes around the intended Access application, or another proxy forwarding the assertion unchanged.\n\nA successful sign-in also depends on the deployment's sign-in resolver mapping the presented identity to a Backstage user. The resulting impact depends on the permissions assigned to that identity.\n\n### Patches\n\nUpgrade `@backstage/plugin-auth-backend-module-cloudflare-access-provider` to version `0.5.0` or later. The fixed package ","public_affected_ranges":[">= 0.1.0, < 0.5.0"]}],"null_published_at":"2026-11-03T10:03:31.368Z","source_updated_at":"2026-10-07T20:25:28.000Z","source_disclosed_at":"2026-10-07T20:25:25.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-11-01T00:58:46.232Z"},{"id":"NVI-00012018","kind":"vulnerability","title":"Backstage: Insufficient audience validation in the Cloudflare Access auth provider","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-q333-f498-w2x7","CVE-2026-106457"],"plain_summary":"GitHub lists this reviewed advisory for @backstage/plugin-auth-backend-module-cloudflare-access-provider. 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-89fecdf985db46d412a5af7aebadd160"],"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":"2026-10-07T20:25:28.000Z","value":"6.8 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-89fecdf985db46d412a5af7aebadd160"}],"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-89fecdf985db46d412a5af7aebadd160","url":"https://github.com/advisories/GHSA-q333-f498-w2x7","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-q333-f498-w2x7","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T00:58:46.232Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-89fecdf985db46d412a5af7aebadd160"],"technology":"@backstage/plugin-auth-backend-module-cloudflare-access-provider","known_exclusions":[],"conditions_summary":"### Impact\n\nThe Cloudflare Access auth provider verifies a token's signature and team issuer, but affected versions do not verify that the token was issued for the Backstage application. A user holding a valid token for another Access application in the same Cloudflare Zero Trust team may therefore be able to authenticate to Backstage if that token reaches the auth endpoint without the Backstage application's audience already being enforced upstream.\n\nCloudflare Access normally evaluates the protected application before forwarding requests. The reported reproduction exercises the provider directly and does not demonstrate bypass through the ordinary Cloudflare-protected Backstage URL. Relevant deployment topologies include direct origin access, alternate routes around the intended Access application, or another proxy forwarding the assertion unchanged.\n\nA successful sign-in also depends on the deployment's sign-in resolver mapping the presented identity to a Backstage user. The resulting impact depends on the permissions assigned to that identity.\n\n### Patches\n\nUpgrade `@backstage/plugin-auth-backend-module-cloudflare-access-provider` to version `0.5.0` or later. The fixed package ","public_affected_ranges":[">= 0.1.0, < 0.5.0"]}],"null_published_at":"2026-11-01T01:03:56.622Z","source_updated_at":"2026-10-07T20:25:28.000Z","source_disclosed_at":"2026-10-07T20:25:25.000Z","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":"2026-11-01T00:58:46.232Z"}],"next_cursor":null,"snapshot_revision":"42594"}