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CVE-2026-106460— Backstage: Explicit negative email verification can be ignored during shared OAuth profile normalization

Quick assessment

Affected
backstage backstage
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Backstage 是一个用于构建开发者门户的开源框架。在版本 0.3.0 至 0.6.14 以及 0.7.0 至 0.7.4 中， 包在共享 OAuth 个人资料规范化过程中，未始终如一地尊重显式的电子邮件验证否定状态。受影响的场景包括：已选个人资料中标记为 的电子邮件、匹配原始提供商电子邮件标记为 的场景，以及仅从 ID token 获取且标记为 的电子邮件。 漏洞利用需要满足以下条件： 1. 存在一个已通过的身份提供商用户，该用户能够提供或更改未经过验证的电子邮件地址； 2. 部署配置中使用“已选个人资料电子

CVSS 6.8 · Medium
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I. Basic Information for CVE-2026-106460

Vulnerability Information
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Vulnerability Title
Backstage: Explicit negative email verification can be ignored during shared OAuth profile normalization
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
backstage backstage >= 1.18.0, < 1.49.7 -
@backstage plugin-auth-node >= 0.3.0, < 0.6.15 -

II. Public POCs for CVE-2026-106460

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III. Intelligence Information for CVE-2026-106460

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Other References for CVE-2026-106460 (6)

Same Patch Batch · backstage · 2026-10-06 · 18 CVEs total

CVE-2026-106459 8.5 HIGH Backstage: Improper input validation in Sentry scaffolder actions
CVE-2026-106486 8.5 HIGH Backstage: Improper filesystem validation in Bitbucket pull-request scaffolder actions
CVE-2026-106488 8.1 HIGH Backstage: Improper authentication in the OIDC provider
CVE-2026-106455 7.7 HIGH Backstage: Improper validation of MkDocs plugin configuration in TechDocs
CVE-2026-106492 7.6 HIGH Backstage: Improper preservation of access restrictions during service credential delegati
CVE-2026-106457 6.8 MEDIUM Backstage: Insufficient audience validation in the Cloudflare Access auth provider
CVE-2026-106458 6.5 MEDIUM Backstage: Inconsistent repository filtering in Bitbucket Server catalog event updates
CVE-2026-106490 6.5 MEDIUM Backstage: Improper input validation in TechDocs static content requests
CVE-2026-106489 6.5 MEDIUM Backstage: Improper authorization enforcement for TechDocs static content
CVE-2026-106462 6.4 MEDIUM Backstage: Scaffolder credential handling may allow unintended GitHub authentication fallb
CVE-2026-106491 6.4 MEDIUM Backstage: Improper input validation in proxy-backend
CVE-2026-106463 5.4 MEDIUM Backstage: Improper authorization in GitLab organizational user ingestion
CVE-2026-106456 4.8 MEDIUM Backstage: Inconsistent credential enforcement for overlapping proxy routes
CVE-2026-106494 4.4 MEDIUM Backstage: Improper input validation in cloud storage URL readers
CVE-2026-106461 4.3 MEDIUM Backstage: Incorrect authorization in scaffolder task listing
CVE-2026-106487 3.5 LOW Backstage: Unsupported catalog cluster authentication mode in kubernetes backend
CVE-2026-106493 3.0 LOW Backstage: Cloud storage catalog locations may cross configured storage boundaries

IV. Related Vulnerabilities

Same product: backstage
Same vendor: backstage
Same weakness: CWE-287

V. Comments for CVE-2026-106460

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