{"schema":"threatline.record/2","record":{"id":"CVE-2026-106490","aliases":["GHSA-7mfx-xg57-53c9"],"summary":"Backstage: Improper input validation in TechDocs static content requests","details":"### Impact\n\nWhen using the Azure Blob Storage provider, an authenticated Backstage user may be able to read restricted TechDocs content when entity-level permissions are enabled. Deployments that intentionally disable the default backend authentication policy may have broader exposure.\n\n### Patches\n\nPatched in `@backstage/plugin-techdocs-backend` version `2.2.4`\n\n### Workarounds\n\n- Restrict access to the TechDocs backend to users who are permitted to view all stored documentation until an upgrade can be applied.\n- Keep the default backend authentication policy enabled.","categories":["Libraries & packages"],"product":"@backstage/plugin-techdocs-backend","vendor":"backstage","ecosystem":"npm","affected_ranges":[{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-7mfx-xg57-53c9","source_modified_at":"2026-10-07T18:00:04Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"@backstage/plugin-techdocs-backend"},"range":"< 2.2.4"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-106490","source_modified_at":"2026-10-07T17:06:57.542Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"backstage","vendor":"backstage","versions":[{"version":"< 1.54.6","status":"affected"}],"defaultStatus":null},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-106490","source_modified_at":"2026-10-07T17:06:57.542Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"plugin-techdocs-backend","vendor":"@backstage","versions":[{"version":"< 2.2.4","status":"affected"}],"defaultStatus":null},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-7mfx-xg57-53c9","source_modified_at":"2026-10-07T18:15:13.170035612Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"@backstage/plugin-techdocs-backend","purl":"pkg:npm/%40backstage/plugin-techdocs-backend"},"ranges":[{"events":[{"introduced":"0"},{"fixed":"2.2.4"}],"type":"SEMVER"}],"versions":[]}],"fixed_versions":[{"source":"GitHub Advisory Database","source_url":"https://github.com/advisories/GHSA-7mfx-xg57-53c9","source_modified_at":"2026-10-07T18:00:04Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"@backstage/plugin-techdocs-backend"},"version":"2.2.4"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-7mfx-xg57-53c9","source_modified_at":"2026-10-07T18:15:13.170035612Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"@backstage/plugin-techdocs-backend","purl":"pkg:npm/%40backstage/plugin-techdocs-backend"},"version":"2.2.4"}],"cvss":6.5,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00369,"percentile":0.2959,"score_date":"2026-10-23"},"published_at":"2026-10-06T20:41:26.668Z","modified_at":"2026-10-07T18:15:13.170035612Z","provenance":[{"source":"GitHub Advisory Database","url":"https://github.com/advisories/GHSA-7mfx-xg57-53c9","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-07T18:00:04Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-106490","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-07T17:06:57.542Z"},{"source":"OSV","url":"https://osv.dev/vulnerability/GHSA-7mfx-xg57-53c9","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-07T18:15:13.170035612Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-106490","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["GitHub Advisory Database","CVE List","OSV","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/backstage/backstage/security/advisories/GHSA-7mfx-xg57-53c9","tags":["x_refsource_CONFIRM"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-106490","source":"GitHub Advisory Database"},{"source":"CVE List","url":"https://github.com/backstage/backstage/commit/40ecc4c2e88b0218125b0a3405d1f6315b321974","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/backstage/backstage/releases/tag/v1.54.6","tags":["x_refsource_MISC"]},{"url":"https://github.com/advisories/GHSA-7mfx-xg57-53c9","source":"GitHub Advisory Database"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-07T15:27:11.195983Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"ecosystem","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-07T18:15:13.170035612Z","content_hash":"4e79dae256765a6cb0c5f53b8e8ac010fb02fec69c444e415f0b5ce62e44614d"}}