CVE-2026-106505— Backstage: Bypass of MkDocs configuration sanitizer in TechDocs backend
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 1.14.6 和 1.15.4 之前，@backstage/plugin-techdocs-node 软件包存在一个安全漏洞，该漏洞允许绕过 TechDocs 后端中 MkDocs 配置文件的 sanitization（净化/过滤）机制。拥有向使用 TechDocs 的仓库提交更改权限的用户，可以绕过为应对 CVE-2026-25153 而引入的 MkDocs 配置文件净化器，从而在文档生成过程中在 TechDocs 后端主机上执行任意代码。此问题已在
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-106505
Vulnerability Information
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Vulnerability Title
Backstage: Bypass of MkDocs configuration sanitizer in TechDocs backend
Source: CVE Program / CVE List V5
Vulnerability Description
Backstage is an open framework for building developer portals. Prior to 1.14.6 and 1.15.4, the @backstage/plugin-techdocs-node package is affected by bypass of mkdocs configuration sanitizer in techdocs backend. Users with the ability to commit changes to a repository that uses TechDocs can circumvent the MkDocs configuration file sanitizer introduced in response to CVE-2026-25153 and execute arbitrary code on the TechDocs backend host during documentation generation. This issue is fixed in versions 1.14.6 and 1.15.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
不可信的搜索路径
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| backstage | backstage | < 1.50.5 | - |
|
| @backstage | plugin-techdocs-node | < 1.14.6 | - |
|
II. Public POCs for CVE-2026-106505
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-106505 (1)
Vendor Pages for CVE-2026-106505 (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-2026-106505 (2)
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https://github.com/backstage/backstage/security/advisories/GHSA-p75x-jh7p-ppcx 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-2026-106492 | 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-2026-106504
Backstage: Sensitive information exposure in scaffolder task
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CVE-2026-106509
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CVE-2026-106506
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CVE-2026-106504
Backstage: Sensitive information exposure in scaffolder task
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V. Comments for CVE-2026-106505
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