Backstage: Scaffolder credential handling may allow unintended GitHub authentication fallback

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-106462
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-06 21:17:17 UTC
Updated2026-10-07 16:17:38 UTC
DescriptionBackstage is an open framework for building developer portals. Prior to 1.54.6, scaffolder source-control actions may not consistently enforce intended credential boundaries. An authenticated user could cause an affected action to fall back to broader integration credentials and perform operations with more access than intended. This issue is fixed in 1.54.6 when operators also enable scaffolder.requireScmUserCredentials after upgrading.

Risk And Classification

Primary CVSS: v3.1 6.4 MEDIUM from [email protected]

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

EPSS: 0.001710000 probability, percentile 0.059430000 (date 2026-10-07)

Problem Types: CWE-441 | CWE-863 | CWE-441 CWE-441: Unintended Proxy or Intermediary ('Confused Deputy') | CWE-863 CWE-863: Incorrect Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
3.1CNADECLARED6.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

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

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/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
CNA @backstage Plugin-scaffolder-backend-module-azure affected < 0.2.25 Not specified
CNA @backstage Plugin-scaffolder-backend-module-bitbucket-cloud affected < 0.3.10 Not specified
CNA @backstage Plugin-scaffolder-backend-module-bitbucket-server affected < 0.2.25 Not specified
CNA @backstage Plugin-scaffolder-backend-module-github affected < 0.9.13 Not specified
CNA @backstage Plugin-scaffolder-backend-module-gitlab affected < 0.11.10 Not specified

References

ReferenceSourceLinkTags
github.com/backstage/backstage/security/advisories/GHSA-29gx-h2m3-xw44 [email protected] github.com
github.com/backstage/backstage/commit/6fb2a41ea47da37eafe5ea744050ef90be... [email protected] github.com
github.com/backstage/backstage/releases/tag/v1.54.6 [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report