{"cve":"CVE-2026-106486","nvd":{"published":"2026-10-06T21:17:17.323","modified":"2026-10-23T15:01:04.000","status":"Analyzed","description":"Backstage is an open framework for building developer portals. Prior to 0.3.10 in @backstage/plugin-scaffolder-backend-module-bitbucket-cloud and 0.2.25 in @backstage/plugin-scaffolder-backend-module-bitbucket-server, the Bitbucket pull-request Scaffolder actions did not sufficiently validate filesystem paths. An authenticated user who can execute an eligible template and influence an allowed Bitbucket repository could affect paths outside the expected working area, potentially compromising backend confidentiality, integrity, or availability. This issue is fixed in @backstage/plugin-scaffolder-backend-module-bitbucket-cloud 0.3.10 and @backstage/plugin-scaffolder-backend-module-bitbucket-server 0.2.25.","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:H/A:H","score":9.9},"cwes":["CWE-22","CWE-59"],"references":["https://github.com/backstage/backstage/commit/818528e112c36167d76187e9e63fb518399c4dd2","https://github.com/backstage/backstage/releases/tag/v1.54.6","https://github.com/backstage/backstage/security/advisories/GHSA-g8rx-f7m5-7794"],"products":["linuxfoundation:backstage","linuxfoundation:backstage\\/plugin-scaffolder-backend-module-bitbucket-cloud","linuxfoundation:backstage\\/plugin-scaffolder-backend-module-bitbucket-server"],"source":"nvd","synced_at":"2026-10-23T16:39:26.291718493+00:00"},"epss":{"cve":"CVE-2026-106486","score":0.00367,"percentile":0.30321,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-g8rx-f7m5-7794","url":"https://osv.dev/vulnerability/GHSA-g8rx-f7m5-7794","summary":"Backstage has iImproper filesystem validation in Bitbucket pull-request scaffolder actions","modified":"2026-10-07T18:15:12.173151295Z","packages":[{"ecosystem":"npm","name":"@backstage/plugin-scaffolder-backend-module-bitbucket-cloud","purl":"pkg:npm/%40backstage/plugin-scaffolder-backend-module-bitbucket-cloud","ranges":["<0.3.10"],"fixed":["0.3.10"]},{"ecosystem":"npm","name":"@backstage/plugin-scaffolder-backend-module-bitbucket-server","purl":"pkg:npm/%40backstage/plugin-scaffolder-backend-module-bitbucket-server","ranges":["<0.2.25"],"fixed":["0.2.25"]}]}],"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."]}