Backstage is an open framework for building developer portals. Prior to 0.16.1 and 0.17.8, the @backstage/backend-defaults package is affected by improper preservation of access restrictions during service credential delegation. An external service credential configured with access restrictions (e.g., read-only) could bypass those restrictions by routing requests through plugin delegation paths. This could allow a restricted service to perform operations beyond its intended scope, including write operations on plugins it was restricted to read-only access for. This issue is fixed in versions 0.16.1 and 0.17.8.
History

Thu, 22 Oct 2026 14:00:00 +0000

Type Values Removed Values Added
First Time appeared Linuxfoundation
Linuxfoundation backstage
Linuxfoundation backstage\/backend-defaults
CPEs cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:backstage\/backend-defaults:*:*:*:*:*:node.js:*:*
Vendors & Products Linuxfoundation
Linuxfoundation backstage
Linuxfoundation backstage\/backend-defaults

Fri, 09 Oct 2026 09:15:00 +0000

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

Fri, 09 Oct 2026 02:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Wed, 07 Oct 2026 12:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-281
References
Metrics threat_severity

None

threat_severity

Important


Tue, 06 Oct 2026 21:00:00 +0000

Type Values Removed Values Added
Description Backstage is an open framework for building developer portals. Prior to 0.16.1 and 0.17.8, the @backstage/backend-defaults package is affected by improper preservation of access restrictions during service credential delegation. An external service credential configured with access restrictions (e.g., read-only) could bypass those restrictions by routing requests through plugin delegation paths. This could allow a restricted service to perform operations beyond its intended scope, including write operations on plugins it was restricted to read-only access for. This issue is fixed in versions 0.16.1 and 0.17.8.
Title Backstage: Improper preservation of access restrictions during service credential delegation
Weaknesses CWE-269
CWE-863
References
Metrics cvssV3_1

{'score': 7.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-10-06T20:48:05.896Z

Updated: 2026-10-09T01:51:07.252Z

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

Link: CVE-2026-106492

cve-icon Vulnrichment

Updated: 2026-10-09T01:51:03.342Z

cve-icon NVD

Status : Analyzed

Published: 2026-10-06T21:17:18.220

Modified: 2026-10-22T13:40:44.623

Link: CVE-2026-106492

cve-icon Redhat

Severity : Important

Publid Date: 2026-10-06T20:48:05Z

Links: CVE-2026-106492 - Bugzilla