GHSA-3xr5-8w6c-p5gw

Suggest an improvement
Source
https://github.com/advisories/GHSA-3xr5-8w6c-p5gw
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-3xr5-8w6c-p5gw/GHSA-3xr5-8w6c-p5gw.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-3xr5-8w6c-p5gw
Aliases
Published
2026-10-15T20:21:54Z
Modified
2026-10-15T20:30:06Z
Severity
  • 4.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
Summary
Backstage: Improper access control in backend action invocation
Details

Impact

An authenticated user could invoke actions that an operator had excluded through action configuration. Existing action permissions and downstream authorization remain enforced.

Patches

Patched in @backstage/backend-defaults version 0.17.8

Workarounds

Limit access to action invocation endpoints to trusted service callers until upgrading.

Database specific 
{
    "cwe_ids":  [
        "CWE-284"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-10-15T20:21:54Z",
    "nvd_published_at":  "2026-10-12T21:17:08Z",
    "severity":  "MODERATE"
}
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-3xr5-8w6c-p5gw/GHSA-3xr5-8w6c-p5gw.json"