{"cve":"CVE-2026-106495","nvd":{"published":"2026-10-12T21:17:08.457","modified":"2026-10-16T16:00:33.533","status":"Awaiting Analysis","description":"Backstage is an open framework for building developer portals. Prior to 0.17.8, the @backstage/backend-defaults package is affected by improper access control in backend action invocation. An authenticated user could invoke actions that an operator had excluded through action configuration. Existing action permissions and downstream authorization remain enforced. This issue is fixed in version 0.17.8.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","score":4.3},"cwes":["CWE-284"],"references":["https://github.com/backstage/backstage/commit/a8fb34a990a69bcb745e85a3213cf9e5ba2d31a3","https://github.com/backstage/backstage/releases/tag/v1.54.6","https://github.com/backstage/backstage/security/advisories/GHSA-3xr5-8w6c-p5gw"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:58:52.678897993+00:00"},"epss":{"cve":"CVE-2026-106495","score":0.00239,"percentile":0.14779,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-3xr5-8w6c-p5gw","url":"https://osv.dev/vulnerability/GHSA-3xr5-8w6c-p5gw","summary":"Backstage: Improper access control in backend action invocation","modified":"2026-10-15T20:30:06.250180939Z","packages":[{"ecosystem":"npm","name":"@backstage/backend-defaults","purl":"pkg:npm/%40backstage/backend-defaults","ranges":["<0.17.8"],"fixed":["0.17.8"]}]}],"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."]}