GHSA-8qp7-fhr9-fw53
@backstage/plugin-scaffolder-backend Vulnerable to Potential Session Token Exfiltration via Log Redaction Bypass
At a glance
- Published
- Updated
- CVE
- CVE-2026-29184
- CVSS_V3
- CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N
Description
### Impact A malicious scaffolder template can bypass the log redaction mechanism to exfiltrate secrets provided run through task event logs. The attack requires: - The ability to register a template in the catalog - A victim who executes the malicious template ### Patches Patched in `@backstage/plugin-scaffolder-backend` version 3.1.4 ### Workarounds - Implement a custom permission policy that restricts scaffolder.task.read so users can only read their own task logs - Restrict who can register templates in the catalog to trusted users only ### Resources - Backstage Scaffolder permissions documentation: https://backstage.io/docs/permissions/plugin-authors/01-setup/ - Backstage Threat Model: https://backstage.io/docs/overview/threat-model/
Affected packages
| Package | Versions |
|---|---|
| npm · @backstage/plugin-scaffolder-backend | introduced 0, fixed 3.1.4 |
References
- https://github.com/backstage/backstage/security/advisories/GHSA-8qp7-fhr9-fw53 WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-29184 ADVISORY
- https://backstage.io/docs/overview/threat-model WEB
- https://backstage.io/docs/permissions/plugin-authors/01-setup WEB
- https://github.com/backstage/backstage PACKAGE
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — GitHub Advisory Database |