{"cve":"CVE-2026-106459","nvd":{"published":"2026-10-06T21:17:16.450","modified":"2026-10-13T15:27:07.093","status":"Analyzed","description":"Backstage is an open framework for building developer portals. From 0.3.0 until 0.3.8, the @backstage/plugin-scaffolder-backend-module-sentry package is affected by improper input validation in sentry scaffolder actions. An authenticated internal user who can execute the affected actions may cause the backend to contact unintended destinations and disclose Sentry integration credentials. Subsequent impact depends on network reachability and the privileges granted to the configured token. This issue is fixed in version 0.3.8.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N","score":8.5},"cwes":["CWE-200","CWE-918"],"references":["https://github.com/backstage/backstage/commit/b0170fad7962fb8c3d71366b5265cf283c7bbcf7","https://github.com/backstage/backstage/releases/tag/v1.54.8","https://github.com/backstage/backstage/releases/tag/v1.55.0","https://github.com/backstage/backstage/security/advisories/GHSA-g734-fhp4-7mfp"],"products":["linuxfoundation:backstage","linuxfoundation:backstage\\/plugin-scaffolder-backend-module-sentry"],"source":"nvd","synced_at":"2026-10-19T22:58:01.639778232+00:00"},"epss":{"cve":"CVE-2026-106459","score":0.00212,"percentile":0.11391,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-g734-fhp4-7mfp","url":"https://osv.dev/vulnerability/GHSA-g734-fhp4-7mfp","summary":"Backstage: Improper input validation in Sentry scaffolder actions","modified":"2026-10-07T20:30:04.846929529Z","packages":[{"ecosystem":"npm","name":"@backstage/plugin-scaffolder-backend-module-sentry","purl":"pkg:npm/%40backstage/plugin-scaffolder-backend-module-sentry","ranges":[">=0.3.0 <0.3.8"],"fixed":["0.3.8"]}]}],"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."]}