CVE-2026-106462— Backstage: Scaffolder credential handling may allow unintended GitHub authentication fallback
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 1.54.6 之前，Scaffolder（代码脚手架生成器）中的源代码控制操作可能无法始终一致地强制执行预期的凭证边界。经过身份验证的用户可能导致受影响的回退操作使用更宽泛的集成凭证，从而执行超出预期权限的操作。该问题已在版本 1.54.6 中修复，但前提是操作员在升级后启用了 配置项。
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I. Basic Information for CVE-2026-106462
Vulnerability Information
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Vulnerability Title
Backstage: Scaffolder credential handling may allow unintended GitHub authentication fallback
Source: CVE Program / CVE List V5
Vulnerability Description
Backstage 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
未有动机的代理或中间人(混淆代理)
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| backstage | backstage | < 1.54.6 | - |
|
| @backstage | plugin-scaffolder-backend | < 4.1.0 | - |
|
| @backstage | plugin-scaffolder-backend-module-azure | < 0.2.25 | - |
|
| @backstage | plugin-scaffolder-backend-module-bitbucket-cloud | < 0.3.10 | - |
|
| @backstage | plugin-scaffolder-backend-module-bitbucket-server | < 0.2.25 | - |
|
| @backstage | plugin-scaffolder-backend-module-github | < 0.9.13 | - |
|
| @backstage | plugin-scaffolder-backend-module-gitlab | < 0.11.10 | - |
|
II. Public POCs for CVE-2026-106462
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Pages for CVE-2026-106462 (1)
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🔗 Release v1.54.6 · backstage/backstage · GitHub x_refsource_MISC
Other References for CVE-2026-106462 (2)
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https://github.com/backstage/backstage/security/advisories/GHSA-29gx-h2m3-xw44 x_refsource_CONFIRM
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-2026-106460 | 6.8 MEDIUM | Backstage: Explicit negative email verification can be ignored during shared OAuth profile |
| 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-2026-106491 | 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
-
CVE-2026-106494
Backstage: Improper input validation in cloud storage URL re -
CVE-2026-106493
Backstage: Cloud storage catalog locations may cross configu -
CVE-2026-106492
Backstage: Improper preservation of access restrictions duri -
CVE-2026-106491
Backstage: Improper input validation in proxy-backend -
CVE-2026-106490
Backstage: Improper input validation in TechDocs static cont
Same vendor: backstage
-
CVE-2026-106494
Backstage: Improper input validation in cloud storage URL re -
CVE-2026-106493
Backstage: Cloud storage catalog locations may cross configu -
CVE-2026-106492
Backstage: Improper preservation of access restrictions duri -
CVE-2026-106491
Backstage: Improper input validation in proxy-backend -
CVE-2026-106490
Backstage: Improper input validation in TechDocs static cont
Same weakness: CWE-441
V. Comments for CVE-2026-106462
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