CVE-2026-106507— Backstage: TechDocs arbitrary file read via mkdocs snippets
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 1.15.4 版本之前， 包存在通过 MkDocs 片段实现任意文件读取的安全漏洞。TechDocs 在处理源文件树时存在不安全的目录路径解析问题，允许经过身份验证且具备注册文档源权限的用户引入预期文档边界之外的内容。根据具体部署环境，这可能导致构建过程中可访问的敏感文件被泄露。该问题已在 1.15.4 版本中修复。
Possible ATT&CK Techniques 1 AI
T1135 · Network Share Discovery
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I. Basic Information for CVE-2026-106507
Vulnerability Information
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Vulnerability Title
Backstage: TechDocs arbitrary file read via mkdocs snippets
Source: CVE Program / CVE List V5
Vulnerability Description
Backstage is an open framework for building developer portals. Prior to 1.15.4, the @backstage/plugin-techdocs-node package is affected by techdocs arbitrary file read via mkdocs snippets. Unsafe path resolution in TechDocs source tree handling allows an authenticated user who can register documentation sources to include content from outside the intended documentation boundary. Depending on deployment, this may expose files readable by the build process. This issue is fixed in version 1.15.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在文件访问前对链接解析不恰当(链接跟随)
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| backstage | backstage | < 1.54.6 | - |
|
| @backstage/plugin-techdocs-node | plugin-techdocs-node | < 1.15.4 | - |
|
II. Public POCs for CVE-2026-106507
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Pages for CVE-2026-106507 (1)
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🔗 Release v1.54.6 · backstage/backstage · GitHub x_refsource_MISC
Other References for CVE-2026-106507 (2)
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https://github.com/backstage/backstage/security/advisories/GHSA-vmqh-7cj9-mvcj 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-2026-106504 | 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 |
Showing top 20 of 32 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: backstage
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CVE-2026-106509
Backstage: Improper validation of MkDocs theme configuration -
CVE-2026-106508
Backstage: Potential file exposure through local TechDocs pu -
CVE-2026-106506
Backstage: Improper input validation in scaffolder task list -
CVE-2026-106505
Backstage: Bypass of MkDocs configuration sanitizer in TechD -
CVE-2026-106504
Backstage: Sensitive information exposure in scaffolder task
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CVE-2026-106509
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CVE-2026-106504
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Same weakness: CWE-59
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