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  5. CVE-2026-106501

CVE-2026-106501: Backstage: Sensitive information exposure in Scaffolder

October 7, 2026

An authenticated Backstage user who can read another user’s Scaffolder task may receive internal execution data. In deployments where that data contains credentials for an external service, this may permit disclosure and unauthorized changes in that external service.

References

  • github.com/advisories/GHSA-g2v8-7jhw-pp8p
  • github.com/backstage/backstage/commit/66d2219edf0abe33ab7d0c1ced5d069d1e065be5
  • github.com/backstage/backstage/commit/c19838870476a8e29144c84b1a5ac0654ec20fb5
  • github.com/backstage/backstage/commit/e262d649981ff99bb01ca7077807ae3e25e85560
  • github.com/backstage/backstage/releases/tag/v1.49.6
  • github.com/backstage/backstage/releases/tag/v1.50.5
  • github.com/backstage/backstage/releases/tag/v1.54.6
  • github.com/backstage/backstage/security/advisories/GHSA-g2v8-7jhw-pp8p
  • nvd.nist.gov/vuln/detail/CVE-2026-106501

Code Behaviors & Features

Detect and mitigate CVE-2026-106501 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →

Affected versions

All versions before 3.3.1, all versions starting from 3.4.0 before 3.4.1, all versions starting from 4.0.0 before 4.0.3, all versions starting from 4.0.4 before 4.1.0

Fixed versions

  • 3.3.1
  • 3.4.1
  • 4.0.3
  • 4.1.0

Solution

Upgrade to versions 3.3.1, 3.4.1, 4.0.3, 4.1.0 or above.

Impact 9.6 CRITICAL

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

Learn more about CVSS

Weakness

  • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
  • CWE-201: Insertion of Sensitive Information Into Sent Data

Source file

npm/@backstage/plugin-scaffolder-backend/CVE-2026-106501.yml

Spotted a mistake? Edit the file on GitLab.

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