What’s Vulnerable › Vulnerabilities

CVE-2026-106502: Backstage: Sensitive information may be exposed in Scaffolder task failure events

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-06 · updated 2026-10-13
• Weakness: CWE-532

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.

Affected products

• backstage: before 1.54.6 — fixed in 1.54.6
• @backstage plugin-scaffolder-backend: before 4.1.0 — fixed in 4.1.0

How to fix

Upgrade to a fixed version: backstage 1.54.6; @backstage plugin-scaffolder-backend 4.1.0. Check the vendor advisory for mitigations.

References

• https://github.com/backstage/backstage/commit/3f1e869708f002fb9838624b7379deb251691b47
• https://github.com/backstage/backstage/releases/tag/v1.54.6
• https://github.com/backstage/backstage/security/advisories/GHSA-95p4-vv4g-jxxm

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