{"id":"CVE-2026-106486","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-106486","generatedAt":"2026-10-28T02:58:09.500Z","title":"An authenticated user who can execute an eligible template and influence an allowed Bitbucket repository could affect paths outside the expected working area, potentially compromising backend confidentiality, integrity, or availability.","description":"Backstage is an open framework for building developer portals. Prior to 0.3.10 in @backstage/plugin-scaffolder-backend-module-bitbucket-cloud and 0.2.25 in @backstage/plugin-scaffolder-backend-module-bitbucket-server, the Bitbucket pull-request Scaffolder actions did not sufficiently validate filesystem paths. An authenticated user who can execute an eligible template and influence an allowed Bitbucket repository could affect paths outside the expected working area, potentially compromising backend confidentiality, integrity, or availability. This issue is fixed in @backstage/plugin-scaffolder-backend-module-bitbucket-cloud 0.3.10 and @backstage/plugin-scaffolder-backend-module-bitbucket-server 0.2.25.","published":"2026-10-06T21:17:17.000Z","lastModified":"2026-10-23T15:01:04.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":9.9,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},"cwe":["CWE-22","CWE-59"],"affected":["linuxfoundation/backstage\\/plugin-scaffolder-backend-module-bitbucket-cloud","linuxfoundation/backstage\\/plugin-scaffolder-backend-module-bitbucket-server","linuxfoundation/backstage"],"epss":{"score":0.00367,"percentile":0.30354,"date":"2026-10-26","history":[{"date":"2026-10-07","score":0.00325,"percentile":0.23558}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.37%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"scored","label":"Newly scored","at":"2026-10-23T16:15:26.000Z","detail":{"from":"8.5","score":"9.9","severity":"CRITICAL","fromSeverity":"HIGH"},"summary":"Now scored CVSS 9.9 CRITICAL (was 8.5)."},{"kind":"new","label":"New CVE","at":"2026-10-06T21:17:17.000Z","detail":{"score":"8.5","severity":"HIGH","publishedAt":"2026-10-06T21:17:17.323Z"},"summary":"New CVE, critical severity (CVSS 9.9)."}],"references":[{"url":"https://github.com/backstage/backstage/commit/818528e112c36167d76187e9e63fb518399c4dd2","tags":["Patch"],"source":"security-advisories@github.com"},{"url":"https://github.com/backstage/backstage/releases/tag/v1.54.6","tags":["Patch","Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/backstage/backstage/security/advisories/GHSA-g8rx-f7m5-7794","tags":["Mitigation","Vendor Advisory"],"source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-106486","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}