{"id":"CVE-2026-106559","aliases":["EUVD-2026-94372","GHSA-75qf-886x-5xf2"],"status":"published","title":"Backstage: Improper input validation in Confluence to Markdown scaffolder module","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.","severity":{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00332,"percentile":0.26746,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-22","CWE-73"],"published":"2026-10-07T14:48:03Z","modified":"2026-10-28T02:31:07Z","fixes":[{"ecosystem":"npm","package":"@backstage/plugin-scaffolder-backend-module-confluence-to-markdown","fixed_in":["0.3.25"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"@backstage/plugin-scaffolder-backend-module-confluence-to-markdown","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.3.25"}]}]},{"source":"osv","ecosystem":"npm","package":"@backstage/plugin-scaffolder-backend-module-confluence-to-markdown","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.3.25"}]}]}],"products":[{"vendor":"@backstage","product":"plugin-scaffolder-backend-module-confluence-to-markdown"},{"vendor":"backstage","product":"backstage"},{"vendor":"linuxfoundation","product":"backstage"},{"vendor":"linuxfoundation","product":"backstage\\/plugin-scaffolder-backend-module-confluence-to-markdown"}],"references":[{"url":"https://github.com/backstage/backstage/security/advisories/GHSA-75qf-886x-5xf2","tags":["x_refsource_CONFIRM","Mitigation","Vendor Advisory","advisory","web"]},{"url":"https://github.com/backstage/backstage/commit/506c2c11bce3ed9d1f8f50de5d6474b16e43a65e","tags":["x_refsource_MISC","Patch","fix","web"]},{"url":"https://github.com/backstage/backstage/releases/tag/v1.54.6","tags":["x_refsource_MISC","Patch","Release Notes","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-106559","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-75qf-886x-5xf2"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106559.json","tags":["advisory"]},{"url":"https://github.com/backstage/backstage","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-106559","title":"Backstage: Improper input validation in Confluence to Markdown scaffolder module","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.","status":"published","published":"2026-10-07T14:48:03.121Z","modified":"2026-10-07T16:16:19.815Z","cvss":[{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-22","CWE-73"],"updated_at":"2026-11-02T14:20:04.156238Z"}],"euvd":[{"id":"EUVD-2026-94372","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.","status":"published","published":"2026-10-07T14:48:03Z","modified":"2026-10-07T16:16:19Z","cvss":[{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:L","level":"medium"}],"updated_at":"2026-11-02T17:27:35.164729Z"}],"ghsa":[{"id":"GHSA-75qf-886x-5xf2","title":"Backstage: Improper input validation in Confluence to Markdown scaffolder module","description":"### 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.","status":"published","published":"2026-10-07T18:03:06Z","modified":"2026-10-07T18:03:10Z","cvss":[{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:L","level":"medium"}],"cwes":["CWE-22","CWE-73"],"updated_at":"2026-11-02T14:41:28.013673Z"}],"nvd":[{"id":"CVE-2026-106559","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.","status":"published","published":"2026-10-07T15:17:17.12Z","modified":"2026-10-16T15:11:36.053Z","cvss":[{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:L","level":"medium","assessor":"secondary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-22","CWE-73"],"updated_at":"2026-11-02T14:12:54.809359Z"}],"osv":[{"id":"CVE-2026-106559","title":"Backstage: Improper input validation in Confluence to Markdown scaffolder module","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.","status":"published","published":"2026-10-07T14:48:03.121Z","modified":"2026-10-28T02:31:07.468606801Z","cvss":[{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:L","level":"medium"}],"cwes":["CWE-22","CWE-73"],"updated_at":"2026-11-02T15:44:54.583213Z"},{"id":"GHSA-75qf-886x-5xf2","title":"Backstage: Improper input validation in Confluence to Markdown scaffolder module","description":"### 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.","status":"published","published":"2026-10-07T18:03:06Z","modified":"2026-10-07T18:15:12.760429318Z","cvss":[{"version":"3.1","score":6.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:L","level":"medium"}],"cwes":["CWE-22","CWE-73"],"updated_at":"2026-11-02T15:46:40.657155Z"}]}}