GHSA-g734-fhp4-7mfp

Suggest an improvement
Source
https://github.com/advisories/GHSA-g734-fhp4-7mfp
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-g734-fhp4-7mfp/GHSA-g734-fhp4-7mfp.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-g734-fhp4-7mfp
Aliases
Published
2026-10-07T20:25:01Z
Modified
2026-10-07T20:30:04Z
Severity
  • 8.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N CVSS Calculator
Summary
Backstage: Improper input validation in Sentry scaffolder actions
Details

Impact

An authenticated internal user who can execute the affected actions may cause the backend to contact unintended destinations and disclose Sentry integration credentials. Subsequent impact depends on network reachability and the privileges granted to the configured token.

Patches

Upgrade @backstage/plugin-scaffolder-backend-module-sentry to version 0.3.8 or later. The fixed package is available in Backstage v1.54.8 and Backstage v1.55.0.

The update removes custom action-level apiBaseUrl values. Move any such value to scaffolder.sentry.apiBaseUrl before upgrading.

Workarounds

  • Disable the affected actions until the patched package is deployed.
  • Restrict scaffolder.action.execute permission for the affected Sentry actions to trusted users and templates.
Database specific 
{
    "cwe_ids": [
        "CWE-200",
        "CWE-918"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-07T20:25:01Z",
    "nvd_published_at": "2026-10-06T21:17:16Z",
    "severity": "HIGH"
}
References

Affected packages

npm / @backstage/plugin-scaffolder-backend-module-sentry

Package

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

Affected ranges

Type
SEMVER
Events
Introduced
0.3.0
Fixed
0.3.8

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-g734-fhp4-7mfp/GHSA-g734-fhp4-7mfp.json"