CVE-2026-106462

EUVD-2026-93999

06.10.2026, 21:17

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.

Confused Deputy

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
GitHub_M	CNA	6.4 MEDIUM	NETWORK	LOW	LOW	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Base Score

CVSS 3.x

EPSS Score

Percentile: Unknown

Early Detection

Affected products identified ahead of NVD analysis through intelligence sources.

Vendor	Product	Version	Source
backstage	backstage	𝑥 < 1.54.6	CNA
backstage	backstage	𝑥 < 4.1.0	CNA
backstage	backstage	𝑥 < 0.2.25	CNA
backstage	backstage	𝑥 < 0.3.10	CNA
backstage	backstage	𝑥 < 0.9.13	CNA
backstage	backstage	𝑥 < 0.11.10	CNA

Common Weakness Enumeration

CWE-441 - Unintended Proxy or Intermediary ('Confused Deputy')
The product receives a request, message, or directive from an upstream component, but the product does not sufficiently preserve the original source of the request before forwarding the request to an external actor that is outside of the product's control sphere. This causes the product to appear to be the source of the request, leading it to act as a proxy or other intermediary between the upstream component and the external actor.

References

https://github.com/backstage/backstage/commit/6fb2a41ea47da37eafe5ea744050ef90be6820c0

https://github.com/backstage/backstage/releases/tag/v1.54.6

https://github.com/backstage/backstage/security/advisories/GHSA-29gx-h2m3-xw44