{"id":"GHSA-8qp7-fhr9-fw53","summary":"@backstage/plugin-scaffolder-backend Vulnerable to Potential Session Token Exfiltration via Log Redaction Bypass","details":"### Impact\n\nA malicious scaffolder template can bypass the log redaction mechanism to exfiltrate secrets provided run through task event logs.\n\nThe attack requires:\n  - The ability to register a template in the catalog\n  - A victim who executes the malicious template\n\n### Patches\n  Patched in `@backstage/plugin-scaffolder-backend` version 3.1.4\n\n### Workarounds\n  - Implement a custom permission policy that restricts scaffolder.task.read so users can only read their own task logs\n  - Restrict who can register templates in the catalog to trusted users only\n\n### Resources\n  - Backstage Scaffolder permissions documentation: https://backstage.io/docs/permissions/plugin-authors/01-setup/\n  - Backstage Threat Model: https://backstage.io/docs/overview/threat-model/","aliases":["CVE-2026-29184"],"modified":"2026-03-09T16:02:10.503918Z","published":"2026-03-05T00:23:51Z","database_specific":{"github_reviewed_at":"2026-03-05T00:23:51Z","nvd_published_at":"2026-03-07T15:15:55Z","cwe_ids":["CWE-532"],"severity":"LOW","github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/backstage/backstage/security/advisories/GHSA-8qp7-fhr9-fw53"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-29184"},{"type":"WEB","url":"https://backstage.io/docs/overview/threat-model"},{"type":"WEB","url":"https://backstage.io/docs/permissions/plugin-authors/01-setup"},{"type":"PACKAGE","url":"https://github.com/backstage/backstage"}],"affected":[{"package":{"name":"@backstage/plugin-scaffolder-backend","ecosystem":"npm","purl":"pkg:npm/%40backstage/plugin-scaffolder-backend"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.1.4"}]}],"database_specific":{"last_known_affected_version_range":"\u003c= 3.1.3","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-8qp7-fhr9-fw53/GHSA-8qp7-fhr9-fw53.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N"}]}