{"id":"CVE-2026-106559","aliases":["GHSA-75qf-886x-5xf2"],"url":"https://o3.security/vulnerability/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.","published":"2026-10-07T14:48:03.121Z","modified":"2026-10-24T02:48:40.843289716Z","cvss":{"score":6.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"npm","name":"@backstage/plugin-scaffolder-backend-module-confluence-to-markdown","fixedVersion":"0.3.25"}],"fix":{"url":"https://github.com/backstage/backstage/commit/506c2c11bce3ed9d1f8f50de5d6474b16e43a65e","label":"backstage/backstage@506c2c1"},"references":[{"type":"WEB","url":"https://github.com/backstage/backstage/releases/tag/v1.54.6"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106559.json"},{"type":"ADVISORY","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":"FIX","url":"https://github.com/backstage/backstage/commit/506c2c11bce3ed9d1f8f50de5d6474b16e43a65e"},{"type":"PACKAGE","url":"https://github.com/backstage/backstage"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-24T02:48:40.843289716Z"}}