{"cve":"CVE-2026-106506","nvd":{"published":"2026-10-06T22:17:05.993","modified":"2026-10-09T17:50:13.653","status":"Analyzed","description":"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 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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","score":5.3},"cwes":["CWE-202","CWE-203"],"references":["https://github.com/backstage/backstage/commit/e673a869449874a9169e8f89852e75e862011b93","https://github.com/backstage/backstage/releases/tag/v1.54.6","https://github.com/backstage/backstage/security/advisories/GHSA-vwp5-f99x-x3rq"],"products":["linuxfoundation:backstage","linuxfoundation:backstage\\/plugin-scaffolder-backend"],"source":"nvd","synced_at":"2026-10-19T22:58:01.639778232+00:00"},"epss":{"cve":"CVE-2026-106506","score":0.00218,"percentile":0.1212,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-vwp5-f99x-x3rq","url":"https://osv.dev/vulnerability/GHSA-vwp5-f99x-x3rq","summary":"Backstage has improper input validation in scaffolder task list ordering","modified":"2026-10-07T16:30:05.491300441Z","packages":[{"ecosystem":"npm","name":"@backstage/plugin-scaffolder-backend","purl":"pkg:npm/%40backstage/plugin-scaffolder-backend","ranges":["<4.1.0"],"fixed":["4.1.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}