Backstage: Explicit negative email verification can be ignored during shared OAuth profile normalization

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-106460
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-06 21:17:16 UTC
Updated2026-10-06 21:17:16 UTC
DescriptionBackstage is an open framework for building developer portals. From 0.3.0 until 0.6.15 and 0.7.5, the @backstage/plugin-auth-node package did not consistently honor explicit negative email verification during shared OAuth profile normalization. The affected paths include a selected profile email marked verified: false, a matching raw provider email marked email_verified: false, and an email obtained only from an ID token marked email_verified: false. Exploitation requires an admitted identity-provider user who can supply or change an unverified email and a deployment that uses the selected profile email to resolve catalog identities. The verification metadata must apply to the selected email; an absent email_verified claim alone is not affected. In an affected configuration, the user may assume another catalog identity and obtain its associated access and permissions. This issue is fixed in versions 0.6.15 and 0.7.5.

Risk And Classification

Primary CVSS: v3.1 6.8 MEDIUM from [email protected]

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

Problem Types: CWE-287 | CWE-287 CWE-287: Improper Authentication

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.8MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
3.1CNADECLARED6.8MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Backstage Backstage affected >= 1.18.0, < 1.49.7 Not specified
CNA Backstage Backstage affected >= 1.50.0-next.0, < 1.54.7 Not specified
CNA @backstage Plugin-auth-node affected >= 0.3.0, < 0.6.15 Not specified
CNA @backstage Plugin-auth-node affected >= 0.7.0, < 0.7.5 Not specified

References

ReferenceSourceLinkTags
github.com/backstage/backstage/security/advisories/GHSA-xm5q-p7w3-x6cp [email protected] github.com
github.com/backstage/backstage/commit/507e65ab9160aae6b602513dbfaebdd6be... [email protected] github.com
github.com/backstage/backstage/releases/tag/v1.54.7 [email protected] github.com
github.com/backstage/backstage/releases/tag/v1.49.7 [email protected] github.com
github.com/backstage/backstage/commit/f0a43dacd1b501064da042b43eab9c1e06... [email protected] github.com
github.com/backstage/backstage/commit/fc5e30aba8ea7282ed3658c3b985cec710... [email protected] github.com
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