{"cve":"CVE-2026-106559","nvd":{"published":"2026-10-07T15:17:17.120","modified":"2026-10-16T15:11:36.053","status":"Analyzed","description":"Backstage is an open framework for building developer portals. Prior to 0.3.25, the @backstage/plugin-scaffolder-backend-module-confluence-to-markdown package is affected by improper input validation in confluence to markdown scaffolder module. Insufficient input validation in the Confluence to Markdown scaffolder module could allow an attacker to influence file write operations during template execution. Exploitation requires a Backstage user to run a template that processes attacker-influenced Confluence content. This issue is fixed in version 0.3.25.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","score":6.5},"cwes":["CWE-22","CWE-73"],"references":["https://github.com/backstage/backstage/commit/506c2c11bce3ed9d1f8f50de5d6474b16e43a65e","https://github.com/backstage/backstage/releases/tag/v1.54.6","https://github.com/backstage/backstage/security/advisories/GHSA-75qf-886x-5xf2"],"products":["linuxfoundation:backstage","linuxfoundation:backstage\\/plugin-scaffolder-backend-module-confluence-to-markdown"],"source":"nvd","synced_at":"2026-10-19T22:58:01.639778232+00:00"},"epss":{"cve":"CVE-2026-106559","score":0.00332,"percentile":0.26144,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-75qf-886x-5xf2","url":"https://osv.dev/vulnerability/GHSA-75qf-886x-5xf2","summary":"Backstage: Improper input validation in Confluence to Markdown scaffolder module","modified":"2026-10-07T18:15:12.760429318Z","packages":[{"ecosystem":"npm","name":"@backstage/plugin-scaffolder-backend-module-confluence-to-markdown","purl":"pkg:npm/%40backstage/plugin-scaffolder-backend-module-confluence-to-markdown","ranges":["<0.3.25"],"fixed":["0.3.25"]}]}],"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."]}