CVE-2026-106501— Backstage: Sensitive information exposure in Scaffolder
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放框架。在版本 3.3.1、3.4.1、4.0.3 和 4.1.0 之前，@backstage/plugin-scaffolder-backend 插件包存在敏感信息泄露漏洞。经过身份验证的 Backstage 用户如果能够读取其他用户的 Scaffolder 任务，可能会获取到内部执行数据。在某些部署环境中，如果这些数据包含外部服务的凭据，则可能导致这些凭据泄露，并引发对该外部服务的未授权更改。该问题已在版本 3.3.1、3.4.1、4.0.3 和 4.1.0 中得
Possible ATT&CK Techniques 1 AI
T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2026-106501
Vulnerability Information
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Vulnerability Title
Backstage: Sensitive information exposure in Scaffolder
Source: CVE Program / CVE List V5
Vulnerability Description
Backstage is an open framework for building developer portals. Prior to 3.3.1, 3.4.1, 4.0.3 and 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by sensitive information exposure in scaffolder. An authenticated Backstage user who can read another user's Scaffolder task may receive internal execution data. In deployments where that data contains credentials for an external service, this may permit disclosure and unauthorized changes in that external service. This issue is fixed in versions 3.3.1, 3.4.1, 4.0.3 and 4.1.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| backstage | backstage | < 1.49.6 | - |
|
| @backstage | plugin-scaffolder-backend | < 3.3.1 | - |
|
II. Public POCs for CVE-2026-106501
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Pages for CVE-2026-106501 (2)
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🔗 Release v1.50.5 · backstage/backstage · GitHub x_refsource_MISC
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🔗 Release v1.54.6 · backstage/backstage · GitHub x_refsource_MISC
Other References for CVE-2026-106501 (5)
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https://github.com/backstage/backstage/releases/tag/v1.49.6 x_refsource_MISC
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https://github.com/backstage/backstage/security/advisories/GHSA-g2v8-7jhw-pp8p x_refsource_CONFIRM
Same Patch Batch · backstage · 2026-10-06 · 32 CVEs total
| CVE-2026-106459 | 8.5 HIGH | Backstage: Improper input validation in Sentry scaffolder actions |
| CVE-2026-106500 | 8.5 HIGH | Backstage: Improper task state validation in Scaffolder backend |
| CVE-2026-106486 | 8.5 HIGH | Backstage: Improper filesystem validation in Bitbucket pull-request scaffolder actions |
| CVE-2026-106503 | 8.1 HIGH | Backstage: Scaffolder action input authorization bypass |
| 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-2026-106498 | 7.7 HIGH | Backstage: Improper URL validation in catalog entity placeholder resolution |
| CVE-2026-106509 | 7.7 HIGH | Backstage: Improper validation of MkDocs theme configuration in TechDocs |
| CVE-2026-106505 | 7.7 HIGH | Backstage: Bypass of MkDocs configuration sanitizer in TechDocs backend |
| 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-2026-106490 | 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-2026-106504 | 6.5 MEDIUM | Backstage: Sensitive information exposure in scaffolder task logs |
| CVE-2026-106458 | 6.5 MEDIUM | Backstage: Inconsistent repository filtering in Bitbucket Server catalog event updates |
| CVE-2026-106491 | 6.4 MEDIUM | Backstage: Improper input validation in proxy-backend |
| CVE-2026-106462 | 6.4 MEDIUM | Backstage: Scaffolder credential handling may allow unintended GitHub authentication fallb |
| CVE-2026-106463 | 5.4 MEDIUM | Backstage: Improper authorization in GitLab organizational user ingestion |
| CVE-2026-106506 | 5.3 MEDIUM | Backstage: Improper input validation in scaffolder task list ordering |
Showing top 20 of 32 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: backstage
-
CVE-2026-106509
Backstage: Improper validation of MkDocs theme configuration -
CVE-2026-106508
Backstage: Potential file exposure through local TechDocs pu -
CVE-2026-106507
Backstage: TechDocs arbitrary file read via mkdocs snippets -
CVE-2026-106506
Backstage: Improper input validation in scaffolder task list -
CVE-2026-106505
Backstage: Bypass of MkDocs configuration sanitizer in TechD
Same vendor: backstage
-
CVE-2026-106509
Backstage: Improper validation of MkDocs theme configuration -
CVE-2026-106508
Backstage: Potential file exposure through local TechDocs pu -
CVE-2026-106507
Backstage: TechDocs arbitrary file read via mkdocs snippets -
CVE-2026-106506
Backstage: Improper input validation in scaffolder task list -
CVE-2026-106505
Backstage: Bypass of MkDocs configuration sanitizer in TechD
Same weakness: CWE-200
V. Comments for CVE-2026-106501
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