{"schema_version":"1.9.0","id":"GHSA-75qf-886x-5xf2","published":"2026-10-07T18:03:06Z","modified":"2026-10-07T18:15:12.760429318Z","aliases":["CVE-2026-106559"],"summary":"Backstage: Improper input validation in Confluence to Markdown scaffolder module","details":"### Impact\n\nInsufficient 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.\n\n### Patches\n\nPatched in `@backstage/plugin-scaffolder-backend-module-confluence-to-markdown` version `0.3.25`\n\n### Workarounds\n\nIf unable to update immediately:\n\n- Restrict Confluence edit access to trusted users.\n- Review Confluence page content before running scaffolder templates against untrusted pages.","affected":[{"package":{"name":"@backstage/plugin-scaffolder-backend-module-confluence-to-markdown","ecosystem":"npm","purl":"pkg:npm/%40backstage/plugin-scaffolder-backend-module-confluence-to-markdown"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.3.25"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-75qf-886x-5xf2/GHSA-75qf-886x-5xf2.json"}}],"references":[{"type":"WEB","url":"https://github.com/backstage/backstage/security/advisories/GHSA-75qf-886x-5xf2"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-106559"},{"type":"WEB","url":"https://github.com/backstage/backstage/commit/506c2c11bce3ed9d1f8f50de5d6474b16e43a65e"},{"type":"PACKAGE","url":"https://github.com/backstage/backstage"},{"type":"WEB","url":"https://github.com/backstage/backstage/releases/tag/v1.54.6"}],"database_specific":{"cwe_ids":["CWE-22","CWE-73"],"github_reviewed":true,"github_reviewed_at":"2026-10-07T18:03:06Z","nvd_published_at":"2026-10-07T15:17:17Z","severity":"MODERATE"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:L"}]}