Description
Backstage 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.
Published: 2026-10-06
Score: 6.8 Medium
EPSS: < 1% Very Low
KEV: No
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Remediation

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-xm5q-p7w3-x6cp Backstage: Explicit negative email verification can be ignored during shared OAuth profile normalization
History

Fri, 09 Oct 2026 02:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 07 Oct 2026 12:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-290
References
Metrics threat_severity

None

threat_severity

Moderate


Tue, 06 Oct 2026 20:45:00 +0000

Type Values Removed Values Added
Description Backstage 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.
Title Backstage: Explicit negative email verification can be ignored during shared OAuth profile normalization
Weaknesses CWE-287
References
Metrics cvssV3_1

{'score': 6.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N'}


Subscriptions

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-09T01:48:01.580Z

Reserved: 2026-10-06T16:49:40.591Z

Link: CVE-2026-106460

cve-icon Vulnrichment

Updated: 2026-10-09T01:47:57.727Z

cve-icon NVD

Status : Undergoing Analysis

Published: 2026-10-06T21:17:16.707

Modified: 2026-10-09T02:17:00.153

Link: CVE-2026-106460

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-06T20:22:31Z

Links: CVE-2026-106460 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-07T14:15:15Z

Weaknesses