GHSA-cq7v-rfgc-5c7v

Suggest an improvement
Source
https://github.com/advisories/GHSA-cq7v-rfgc-5c7v
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-cq7v-rfgc-5c7v/GHSA-cq7v-rfgc-5c7v.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-cq7v-rfgc-5c7v
Aliases
Published
2026-10-07T17:59:43Z
Modified
2026-10-07T18:15:11Z
Severity
  • 7.6 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L CVSS Calculator
Summary
Backstage: Improper preservation of access restrictions during service credential delegation
Details

Impact

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.

Patches

Patched in @backstage/backend-defaults version 0.17.8

Workarounds

If you're unable to upgrade immediately:

  • If practical, replace restricted credentials with separate, purpose-specific unrestricted credentials scoped to trusted consumers.
  • Restrict network-level access to Backstage backend API endpoints to trusted callers only.
Database specific 
{
    "cwe_ids": [
        "CWE-269",
        "CWE-863"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-07T17:59:43Z",
    "nvd_published_at": "2026-10-06T21:17:18Z",
    "severity": "HIGH"
}
References

Affected packages

npm / @backstage/backend-defaults

Package

Name
@backstage/backend-defaults
View open source insights on deps.dev
Purl
pkg:npm/%40backstage/backend-defaults

Affected ranges

Type
SEMVER
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
0.17.8

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-cq7v-rfgc-5c7v/GHSA-cq7v-rfgc-5c7v.json"