CVE-2026-106502

Analyzed Analyzed - Analysis Complete

BaseFortify

Publication date: 2026-10-06

Last updated on: 2026-10-13

Assigner: GitHub, Inc.

Description

Backstage is an open framework for building developer portals. Prior to 4.1.0, the @backstage/plugin-scaffolder-backend package could expose sensitive information in Scaffolder task failure events. Under specific template and failure conditions, an authenticated user may retrieve backend-managed credentials used during task execution from affected task events. This issue is fixed in version 4.1.0.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-10-06

Last Modified

2026-10-13

Generated

2026-10-19

AI Q&A

2026-10-07

EPSS Evaluated

2026-10-18

NVD

CVE-2026-106502

EUVD

EUVD-2026-94060

Affected Vendors & Products

Vendor	Product	Version / Range
linuxfoundation	backstage/plugin-scaffolder-backend	to 4.1.0 (exc)
linuxfoundation	backstage	to 1.54.6 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-532	The product writes sensitive information to a log file.

Attack-Flow Graph

Executive Summary

This vulnerability in Backstage's @backstage/plugin-scaffolder-backend package allows authenticated users to access sensitive backend-managed credentials through task failure events under specific conditions. The issue occurs when a template fails and exposes these credentials in the event data.

Detection Guidance

To detect this vulnerability, check if your Backstage instance is running a version of @backstage/plugin-scaffolder-backend prior to 4.1.0. Verify the installed version using npm list @backstage/plugin-scaffolder-backend or yarn list @backstage/plugin-scaffolder-backend. If the version is below 4.1.0, the system is vulnerable.

Impact Analysis

An attacker with access could retrieve credentials used by Backstage for tasks, potentially leading to unauthorized access to systems or data managed by these credentials. This could result in data breaches or further exploitation within the environment.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating GDPR's data protection principles or HIPAA's security requirements for protected health information. Organizations may face compliance violations, fines, or reputational damage if exploited.

Mitigation Strategies

Upgrade the @backstage/plugin-scaffolder-backend package to version 4.1.0 or later to address the sensitive information exposure in task failure events.

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