{"id":"CVE-2026-106489","title":"Backstage is an open framework for building developer portals","summary":"Backstage is an open framework for building developer portals. Prior to 2.2.4, the @backstage/plugin-techdocs-backend package is affected by improper authorization enforcement for techdocs static content. An authenticated user with acces…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-22","CWE-862","CWE-639"],"vendor":"backstage","product":"backstage","affected":["backstage < 1.54.6","plugin-techdocs-backend < 2.2.4"],"published":"2026-10-06","updated":"2026-10-07","sourceUpdated":"2026-10-07T16:17:39.200","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-106489","references":[{"url":"https://github.com/backstage/backstage/commit/bf6bbf7326ada7d96d7b2c4ebc4a71546106f311","label":"security-advisories@github.com"},{"url":"https://github.com/backstage/backstage/releases/tag/v1.54.6","label":"security-advisories@github.com"},{"url":"https://github.com/backstage/backstage/security/advisories/GHSA-rg9r-hr7g-5gc2","label":"security-advisories@github.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-106489.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-106489"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2547195"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-106489"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-106489"},{"url":"https://github.com/advisories/GHSA-rg9r-hr7g-5gc2"}],"tags":["nvd","cve.org","csaf","vex","red-hat","ghsa","npm"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-07T15:27:04.062511Z"},"ingestedAt":"2026-10-06T21:20:28.984Z","aliases":["GHSA-rg9r-hr7g-5gc2"],"ecosystem":"npm","patched":["@backstage/plugin-techdocs-backend 2.2.4"],"epss":0.00289,"epssPercentile":0.213,"slug":"CVE-2026-106489","body":"## Overview\n\nBackstage is an open framework for building developer portals. Prior to 2.2.4, the @backstage/plugin-techdocs-backend package is affected by improper authorization enforcement for techdocs static content. An authenticated user with access to one TechDocs documentation site could craft a URL able to read documentation belonging to a different entity. This only affects deployments using the external TechDocs builder with an external storage provider (S3, GCS, etc.) and the permission framework enabled. Instances that do not use the permission framework are unaffected, since TechDocs content is visible to all authenticated users by design. This issue is fixed in version 2.2.4.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Developer Hub, Self-service automation portal 2 · no fix planned: Red Hat Developer Hub, Self-service automation portal 2 · updated 2026-10-07 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-106489.json)\n\n## Package advisory (CVE-2026-106489)\n\nAffected packages:\n\n- `@backstage/plugin-techdocs-backend < 2.2.4`\n\nPatched in:\n\n- `@backstage/plugin-techdocs-backend 2.2.4`\n\nSource: https://github.com/advisories/GHSA-rg9r-hr7g-5gc2","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}