{"schemaVersion":3,"id":"CVE-2026-106560","aliases":["GHSA-2cmg-v53w-8xfp"],"status":"published","duplicateOf":null,"title":null,"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 repository path validation in a scaffolder backend module. An authenticated user who can execute an affected template and control its repository file location may cause generated content to be written outside the task workspace, within locations writable by the Backstage backend process. This issue is fixed in version 0.3.25.","dates":{"published":"2026-10-07T14:50:25.384Z","modified":"2026-10-07T17:12:52.034Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.1,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":7.1,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Npm","score":7.1,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L","exploitability":7.2,"impact":7,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00314,"percentile":0.22897,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[{"date":"2026-10-08T00:00:00.000Z","score":0.00329,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00329,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00329,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00329,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00329,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00329,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00329,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00329,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00329,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00314,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00314,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00314,"percentile":0.22897}],"last30":[{"date":"2026-10-08T00:00:00.000Z","score":0.00329,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00329,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00329,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00329,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00329,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00329,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00329,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00329,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00329,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00314,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00314,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00314,"percentile":0.22897}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","description":"The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.","type":"weakness","status":"Stable","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/22.html"}],"affected":[{"vendor":"backstage","product":"backstage","name":"backstage","label":"backstage","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 1.54.6","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.54.6","eol":null,"hubHref":"/vendor/backstage/backstage"},{"vendor":"@backstage","product":"plugin-scaffolder-backend-module-confluence-to-markdown","name":"plugin-scaffolder-backend-module-confluence-to-markdown","label":"plugin-scaffolder-backend-module-confluence-to-markdown","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 0.3.25","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.3.25","eol":null,"hubHref":"/vendor/backstage/plugin-scaffolder-backend-module-confluence-to-markdown"},{"vendor":"linuxfoundation","product":"backstage","name":"backstage","label":"backstage","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 1.54.6","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.54.6","eol":null,"hubHref":"/vendor/linuxfoundation/backstage"},{"vendor":"linuxfoundation","product":"backstage\\/plugin-scaffolder-backend-module-confluence-to-markdown","name":"backstage\\/plugin-scaffolder-backend-module-confluence-to-markdown","label":"backstage\\/plugin-scaffolder-backend-module-confluence-to-markdown","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 0.3.25","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.3.25","eol":null,"hubHref":"/vendor/linuxfoundation/backstageplugin-scaffolder-backend-module-confluence-to-markdown"},{"vendor":"@backstage","product":"plugin-scaffolder-backend-module-confluence-to-markdown","name":"@backstage/plugin-scaffolder-backend-module-confluence-to-markdown","label":"plugin-scaffolder-backend-module-confluence-to-markdown","ecosystem":"Npm","cpePart":null,"purl":"pkg:npm/@backstage/plugin-scaffolder-backend-module-confluence-to-markdown","purlType":"npm","versions":[{"text":"< 0.3.25","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.3.25","eol":null,"hubHref":null}],"affectedCount":5,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/backstage/backstage/security/advisories/GHSA-2cmg-v53w-8xfp","label":"github.com/backstage/backstage/security/advisories/GHSA-2cmg-v53w-8xfp","hostname":"github.com","tags":["X Refsource CONFIRM","WEB","Mitigation","Patch","Vendor Advisory"]},{"url":"https://github.com/backstage/backstage/commit/5f0000c1d0af05571e357926b3fa33a453337ff0","label":"github.com/backstage/backstage/commit/5f0000c1d0af05571e357926b3fa33a453337ff0","hostname":"github.com","tags":["X Refsource MISC","WEB","Patch"]},{"url":"https://github.com/backstage/backstage/releases/tag/v1.54.6","label":"github.com/backstage/backstage/releases/tag/v1.54.6","hostname":"github.com","tags":["X Refsource MISC","WEB","Patch","Release Notes"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-106560","label":"nvd.nist.gov/vuln/detail/CVE-2026-106560","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://github.com/backstage/backstage","label":"github.com/backstage/backstage","hostname":"github.com","tags":["PACKAGE"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-10-07T14:50:25.384Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-07T17:12:52.034Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":28,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T03:41:56.516Z","stale":false,"partial":false}}