Backstage is an open framework for building developer portals. Prior to 0.17.8, the @backstage/backend-defaults package is affected by improper access control in backend action invocation. An authenticated user could invoke actions that an operator had excluded through action configuration. Existing action permissions and downstream authorization remain enforced. This issue is fixed in version 0.17.8.
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-3xr5-8w6c-p5gw Backstage: Improper access control in backend action invocation
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Tue, 13 Oct 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 12 Oct 2026 22:00:00 +0000

Type Values Removed Values Added
First Time appeared Backstage
Backstage backend-defaults
Backstage backstage
Vendors & Products Backstage
Backstage backend-defaults
Backstage backstage

Mon, 12 Oct 2026 20:30:00 +0000

Type Values Removed Values Added
Description Backstage is an open framework for building developer portals. Prior to 0.17.8, the @backstage/backend-defaults package is affected by improper access control in backend action invocation. An authenticated user could invoke actions that an operator had excluded through action configuration. Existing action permissions and downstream authorization remain enforced. This issue is fixed in version 0.17.8.
Title Backstage: Improper access control in backend action invocation
Weaknesses CWE-284
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-13T14:57:21.381Z

Reserved: 2026-10-06T18:46:47.766Z

Link: CVE-2026-106495

cve-icon Vulnrichment

Updated: 2026-10-13T14:57:17.891Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-12T21:17:08.457

Modified: 2026-10-16T16:00:33.533

Link: CVE-2026-106495

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-12T21:45:17Z

Weaknesses