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CVE-2026-106503 Details

Description

Backstage is an open framework for building developer portals. Prior to 3.3.1, 3.4.1, 4.0.3 and 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by scaffolder action input authorization bypass. An authenticated user with access to affected Scaffolder templates could bypass configured action restrictions. Depending on integration credentials, this could grant unauthorized access to repositories and related source-control resources. This issue is fixed in versions 3.3.1, 3.4.1, 4.0.3 and 4.1.0.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:8.1 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/backstage/backstage/commit/11c1384c0649b8ab26391c6a4e4f34b80ab0d188	[email protected]
https://github.com/backstage/backstage/commit/a91ed72d540e80b62a73b39bb1563ff5018d52d1	[email protected]
https://github.com/backstage/backstage/commit/e307e4f487103d815e484291b3fda778ab9983bf	[email protected]
https://github.com/backstage/backstage/releases/tag/v1.49.6	[email protected]
https://github.com/backstage/backstage/releases/tag/v1.50.5	[email protected]
https://github.com/backstage/backstage/releases/tag/v1.54.6	[email protected]
https://github.com/backstage/backstage/security/advisories/GHSA-hmp2-4m7g-22cv	[email protected]

see all 7 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-178	Improper Handling of Case Sensitivity	[email protected]
CWE-284	Improper Access Control	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

1 change record found show changes