{"id":"CVE-2026-106490","aliases":["GHSA-7mfx-xg57-53c9"],"url":"https://o3.security/vulnerability/CVE-2026-106490","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.","published":"2026-10-06T20:41:26.668Z","modified":"2026-10-24T02:49:32.114088817Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"npm","name":"@backstage/plugin-techdocs-backend","fixedVersion":"2.2.4"}],"fix":{"url":"https://github.com/backstage/backstage/commit/40ecc4c2e88b0218125b0a3405d1f6315b321974","label":"backstage/backstage@40ecc4c"},"references":[{"type":"WEB","url":"https://github.com/backstage/backstage/releases/tag/v1.54.6"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106490.json"},{"type":"ADVISORY","url":"https://github.com/backstage/backstage/security/advisories/GHSA-7mfx-xg57-53c9"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-106490"},{"type":"FIX","url":"https://github.com/backstage/backstage/commit/40ecc4c2e88b0218125b0a3405d1f6315b321974"},{"type":"PACKAGE","url":"https://github.com/backstage/backstage"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-24T02:49:32.114088817Z"}}