CVE-2026-106502

MEDIUM CVSS 3.1: 5.3 EPSS 0.29%
Updated Oct 13, 2026
Backstage
Parameter Value
CVSS 5.3 (MEDIUM)
Affected Versions before 4.1.0
Fixed In 4.1.0
Type CWE-532
Vendor Backstage
Public PoC No

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.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
None
No data modification
Availability
None
No disruption

CVSS Vector v3.1

Weakness Type (CWE)

Vulnerable Products 2

Configuration From (including) Up to (excluding)
Linuxfoundation Backstage\/Plugin-Scaffolder-Backend
cpe:2.3:a:linuxfoundation:backstage\/plugin-scaffolder-backend:*:*:*:*:*:*:*:*
— 4.1.0
Linuxfoundation Backstage
cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*
— 1.54.6