CVE-2026-106492
6.5
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Exploitability: 2.8 / Impact: 3.6
Source: NVD
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.
Affected (4)
Products: Linuxfoundation: Backstage/backend Defaults, Backstage
Configuration A
| Vulnerable Software | Affected Versions |
|---|---|
| version < 0.16.1 |
Configuration B
| Vulnerable Software | Affected Versions |
|---|---|
| version < 1.49.6 |
Related CWEs
CWE-269
Improper Privilege Management
The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
CWE-863
Incorrect Authorization
The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.
References (5)
Source: security-advisories@github.com
Patch
Source: security-advisories@github.com
Patch
Source: security-advisories@github.com
PatchRelease Notes
Source: security-advisories@github.com
PatchRelease Notes
Source: security-advisories@github.com
MitigationVendor Advisory
Timeline
No history available yet.