What is CVE-2026-106502?

CVE-2026-106502 is a medium-severity vulnerability in @Backstage Plugin-Scaffolder-Backend, classified under Insertion of Sensitive Information into Log File. CVSS score: 5.3/10. Published 2026-10-06.

How severe is CVE-2026-106502?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Information disclosure in @Backstage Plugin-Scaffolder-Backend

CVE-2026-106502

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.

Published 2026-10-06 · last modified 2026-10-07.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

@Backstage Plugin-Scaffolder-Backend — versions < 4.1.0
Backstage — versions < 1.54.6

Weakness classification (CWE)

CWE-532 — Insertion of Sensitive Information into Log File

References

Frequently asked questions

What is CVE-2026-106502?: CVE-2026-106502 is a medium-severity vulnerability in @Backstage Plugin-Scaffolder-Backend, classified under Insertion of Sensitive Information into Log File. CVSS score: 5.3/10. Published 2026-10-06.
How severe is CVE-2026-106502?: Medium severity. CVSS v3 base score is 5.3 out of 10.