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CVE-2026-106459: Backstage: Improper input validation in Sentry scaffolder actions

October 7, 2026

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.

References

  • github.com/advisories/GHSA-g734-fhp4-7mfp
  • github.com/backstage/backstage/commit/b0170fad7962fb8c3d71366b5265cf283c7bbcf7
  • github.com/backstage/backstage/releases/tag/v1.54.8
  • github.com/backstage/backstage/releases/tag/v1.55.0
  • github.com/backstage/backstage/security/advisories/GHSA-g734-fhp4-7mfp
  • nvd.nist.gov/vuln/detail/CVE-2026-106459

Code Behaviors & Features

Detect and mitigate CVE-2026-106459 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →

Affected versions

All versions starting from 0.3.0 before 0.3.8

Fixed versions

  • 0.3.8

Solution

Upgrade to version 0.3.8 or above.

Impact 8.5 HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

Learn more about CVSS

Weakness

  • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
  • CWE-918: Server-Side Request Forgery (SSRF)

Source file

npm/@backstage/plugin-scaffolder-backend-module-sentry/CVE-2026-106459.yml

Spotted a mistake? Edit the file on GitLab.

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