Vulnerability · Published Oct 6, 2026 · Assigned by GitHub_M
CVE-2026-106502Backstage: Sensitive information may be exposed in Scaffolder task failure events
Medium 5.3
In plain English
A medium-severity sensitive data in logs in backstage from backstage. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Backstage is an open framework for building developer portals. Prior to 4.1.0, the @backstage/plugin-scaffolder-backend package could expose sensitive information in Scaffolder task failure events. Under specific template and failure conditions, an authenticated user may retrieve backend-managed credentials used during task execution from affected task events. This issue is fixed in version 4.1.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | @backstage/plugin-scaffolder-backend | 4.1.0 | GHSA-95p4-vv4g-jxxm |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| backstage | backstage | < 1.54.6 |
| @backstage | plugin-scaffolder-backend | < 4.1.0 |
Weakness: CWE-532 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N