{"id":"CVE-2026-106499","published":"2026-10-06T22:17:04.907","lastModified":"2026-10-07T18:17:16.527","description":"Backstage is an open framework for building developer portals. Prior to 4.1.0, the @backstage/plugin-scaffolder-backend package could expose secret-derived values in Scaffolder task logs. Deployments that configure sensitive scaffolder.defaultEnvironment.secrets and allow an attacker to create or modify Scaffolder templates are affected. A template author could cause secret-derived values used during template iteration to be persisted and exposed to users who can access the resulting task logs. This issue is fixed in version 4.1.0.","cvssScore":4.9,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N","cwes":["CWE-532"],"vendors":[],"products":[],"references":[{"url":"https://github.com/backstage/backstage/commit/dc30fae2d96cb1606d36cc40b242f9b9e539bd70","tags":[]},{"url":"https://github.com/backstage/backstage/releases/tag/v1.54.6","tags":[]},{"url":"https://github.com/backstage/backstage/security/advisories/GHSA-mfvq-x7vr-rgqg","tags":[]}],"exploitRefs":[{"url":"https://github.com/backstage/backstage/commit/dc30fae2d96cb1606d36cc40b242f9b9e539bd70","tags":[]},{"url":"https://github.com/backstage/backstage/releases/tag/v1.54.6","tags":[]},{"url":"https://github.com/backstage/backstage/security/advisories/GHSA-mfvq-x7vr-rgqg","tags":[]}],"hasPoc":true,"ai":null}