{"id":"CVE-2026-106506","title":"Backstage is an open framework for building developer portals","summary":"Backstage is an open framework for building developer portals. Prior to 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by improper input validation in scaffolder task list ordering. An authenticated Backstage user wi…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-202","CWE-203","CWE-205"],"vendor":"linuxfoundation","product":"backstage/plugin-scaffolder-backend","affected":["backstage/plugin-scaffolder-backend < 4.1.0","backstage < 1.54.6"],"patched":["backstage/plugin-scaffolder-backend 4.1.0","backstage 1.54.6"],"published":"2026-10-06","updated":"2026-10-09","sourceUpdated":"2026-10-09T17:50:13.653","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-106506","references":[{"url":"https://github.com/backstage/backstage/commit/e673a869449874a9169e8f89852e75e862011b93","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-vwp5-f99x-x3rq","label":"security-advisories@github.com"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-106506"},{"url":"https://github.com/advisories/GHSA-vwp5-f99x-x3rq"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-106506.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-106506"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2547221"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-106506"}],"tags":["nvd","ghsa","npm","cve.org","csaf","vex","red-hat"],"epss":0.00218,"epssPercentile":0.12153,"aliases":["GHSA-vwp5-f99x-x3rq"],"ecosystem":"npm","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-07T15:27:07.462310Z"},"ingestedAt":"2026-10-06T22:23:15.968Z","slug":"CVE-2026-106506","body":"## Overview\n\nBackstage is an open framework for building developer portals. Prior to 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by improper input validation in scaffolder task list ordering. An authenticated Backstage user with permission to create and read relevant scaffolder tasks may be able to infer confidential task data under specific conditions. Successful exploitation requires retained task secrets, visibility of a target task, knowledge of the secret structure, and repeated requests. This issue is fixed in version 4.1.0.\n\n## Affected\n\n- `backstage/plugin-scaffolder-backend < 4.1.0`\n- `backstage < 1.54.6`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `backstage/plugin-scaffolder-backend 4.1.0`\n- `backstage 1.54.6`\n\n## Package advisory (CVE-2026-106506)\n\nAffected packages:\n\n- `@backstage/plugin-scaffolder-backend < 4.1.0`\n\nPatched in:\n\n- `@backstage/plugin-scaffolder-backend 4.1.0`\n\nSource: https://github.com/advisories/GHSA-vwp5-f99x-x3rq\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 2026-10-09 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-106506.json)","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}