Backstage: Improper input validation in scaffolder task list ordering

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-106506
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-06 22:17:05 UTC
Updated2026-10-06 22:17:05 UTC
DescriptionBackstage is an open framework for building developer portals. Prior to 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by improper input validation in scaffolder task list ordering. An authenticated Backstage user with permission to create and read relevant scaffolder tasks may be able to infer confidential task data under specific conditions. Successful exploitation requires retained task secrets, visibility of a target task, knowledge of the secret structure, and repeated requests. This issue is fixed in version 4.1.0.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

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

Problem Types: CWE-202 | CWE-203 | CWE-202 CWE-202: Exposure of Sensitive Information Through Data Queries | CWE-203 CWE-203: Observable Discrepancy

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
3.1CNADECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Backstage Backstage affected < 1.54.6 Not specified
CNA @backstage Plugin-scaffolder-backend affected < 4.1.0 Not specified

References

ReferenceSourceLinkTags
github.com/backstage/backstage/commit/e673a869449874a9169e8f89852e75e862... [email protected] github.com
github.com/backstage/backstage/security/advisories/GHSA-vwp5-f99x-x3rq [email protected] github.com
github.com/backstage/backstage/releases/tag/v1.54.6 [email protected] github.com
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