CVE-2026-106492
Backstage: Improper preservation of access restrictions during service credential delegation
- State
- Published
- Severity
- 7.6 High
- Published
- Oct 6, 2026
- Updated
- Oct 9, 2026
- Reserved
- Oct 6, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.6 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L | GitHub_M |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
backstagebackstage |
|
backend-defaults@backstage |
|
References
- https://github.com/backstage/backstage/security/advisories/GHSA-cq7v-rfgc-5c7v
- https://github.com/backstage/backstage/commit/40346245c53e1bf26dee56601e95c5c4ab9cc124
- https://github.com/backstage/backstage/commit/bc80ffdafbc92ff7b8c72347eace13cb8688fd33
- https://github.com/backstage/backstage/releases/tag/v1.49.6
- https://github.com/backstage/backstage/releases/tag/v1.54.6
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