CVE-2026-106504— Backstage: Sensitive information exposure in scaffolder task logs
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 是用于构建开发者门户的开放框架。在 4.1.0 版本之前，@backstage/plugin-scaffolder-backend 包存在模板任务日志中的敏感信息泄露问题。经过身份验证且能够创建和读取模板任务的用戶，在具有受限操作权限且使用受影响模板的部署环境中，可能观察到任务日志中的敏感值。利用该漏洞需要触发一个被拒绝的操作，其输入包含此类敏感值。该问题已在 4.1.0 版本中得到修复。
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I. Basic Information for CVE-2026-106504
Vulnerability Information
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Vulnerability Title
Backstage: Sensitive information exposure in scaffolder task logs
Source: CVE Program / CVE List V5
Vulnerability Description
Backstage is an open framework for building developer portals. Prior to 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by sensitive information exposure in scaffolder task logs. An authenticated user who can create and read scaffolder tasks may be able to observe sensitive values in task logs in deployments with restrictive action permissions and affected templates. Exploitation requires a denied action whose input contains such a value. This issue is fixed in version 4.1.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过日志文件的信息暴露
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 | - |
|
II. Public POCs for CVE-2026-106504
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Pages for CVE-2026-106504 (1)
-
🔗 Release v1.54.6 · backstage/backstage · GitHub x_refsource_MISC
Other References for CVE-2026-106504 (2)
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https://github.com/backstage/backstage/security/advisories/GHSA-4xvq-3m68-h444 x_refsource_CONFIRM
Same Patch Batch · backstage · 2026-10-06 · 32 CVEs total
| CVE-2026-106501 | 9.6 CRITICAL | Backstage: Sensitive information exposure in Scaffolder |
| 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-2026-106458 | 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-2026-106507 | 5.3 MEDIUM | Backstage: TechDocs arbitrary file read via mkdocs snippets |
Showing top 20 of 32 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
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CVE-2026-106509
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CVE-2026-106505
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Same vendor: backstage
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CVE-2026-106506
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CVE-2026-106505
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Same weakness: CWE-532
-
CVE-2026-106502
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Dell Container Storage Modules <1.18.0 日志信息泄露 -
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Armatura LLC Armatura One Insertion of Sensitive Information
V. Comments for CVE-2026-106504
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