CVE-2026-106502

Backstage: Sensitive information may be exposed in Scaffolder task failure events

MEDIUM
5.3
CVSS Score
Published: October 6, 2026 at 09:34 PM UTC
Updated: October 13, 2026 at 02:38 PM UTC
4 products affected across 2 vendorsBackstageBackstage /plugin Scaffolder BackendBackstage

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

References (3)

x_refsource_CONFIRMMitigationVendor Advisory
Source: cverecord
https://github.com/backstage/backstage/security/advisories/GHSA-95p4-vv4g-jxxm
x_refsource_MISCPatchRelease Notes
Source: cverecord
https://github.com/backstage/backstage/releases/tag/v1.54.6

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
HIGH
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-532

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