What is CVE-2026-106462?

CVE-2026-106462 is a medium-severity vulnerability in @Backstage Plugin-Scaffolder-Backend, classified under Unintended Proxy or Intermediary (Confused Deputy). CVSS score: 6.4/10. Published 2026-10-06.

How severe is CVE-2026-106462?

Medium severity. CVSS v3 base score is 6.4 out of 10.

Auth bypass in @Backstage Plugin-Scaffolder-Backend

CVE-2026-106462

Backstage is an open framework for building developer portals. Prior to 1.54.6, scaffolder source-control actions may not consistently enforce intended credential boundaries. An authenticated user could cause an affected action to fall back to broader integration credentials and perform operations with more access than intended. This issue is fixed in 1.54.6 when operators also enable scaffolder.requireScmUserCredentials after upgrading.

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

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/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 Plugin-Scaffolder-Backend-Module-Azure — versions < 0.2.25
@Backstage Plugin-Scaffolder-Backend-Module-Github — versions < 0.9.13
@Backstage Plugin-Scaffolder-Backend-Module-Gitlab — versions < 0.11.10
Backstage — versions < 1.54.6

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-106462?: CVE-2026-106462 is a medium-severity vulnerability in @Backstage Plugin-Scaffolder-Backend, classified under Unintended Proxy or Intermediary (Confused Deputy). CVSS score: 6.4/10. Published 2026-10-06.
How severe is CVE-2026-106462?: Medium severity. CVSS v3 base score is 6.4 out of 10.