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CVE-2026-106510— Backstage: Remote code execution via crafted markdown_extensions in TechDocs mkdocs.yml

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 1.14.6 版本之前， 包存在远程代码执行漏洞，该漏洞可通过在 TechDocs 的 mkdocs.yml 中构造恶意 来触发。具有注册目录实体权限的认证用户可以提交恶意的 mkdocs.yml 文件，当文档构建时，将在 TechDocs 构建主机上导致任意操作系统命令执行。此问题已在 1.14.6 和 1.15.4 版本中得到修复。

CVSS 7.7 · High

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2026-106510

Vulnerability Information
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Vulnerability Title
Backstage: Remote code execution via crafted markdown_extensions in TechDocs mkdocs.yml
Source: CVE Program / CVE List V5
Vulnerability Description
Backstage is an open framework for building developer portals. Prior to 1.14.6, the @backstage/plugin-techdocs-node package is affected by remote code execution via crafted markdown_extensions in techdocs mkdocs.yml. An authenticated user who can register catalog entities can provide a crafted mkdocs.yml causing arbitrary OS command execution on the TechDocs build host when the docs are built. 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
宽松定义的白名单
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-2026-106510

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III. Intelligence Information for CVE-2026-106510

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Patches & Fixes for CVE-2026-106510 (2)

Vendor Pages for CVE-2026-106510 (2)

Other References for CVE-2026-106510 (1)

Same Patch Batch · backstage · 2026-10-07 · 9 CVEs total

CVE-2026-106558 8.8 HIGH Backstage: Improper validation of TechDocs MkDocs configuration
CVE-2026-106556 7.7 HIGH Backstage: Configuration bypass in TechDocs mkdocs.yml sanitization
CVE-2026-106557 7.7 HIGH Backstage: Improper input validation in TechDocs Markdown extension configuration
CVE-2026-106560 7.1 HIGH Backstage: Improper repository path validation in a Scaffolder backend module
CVE-2026-106559 6.3 MEDIUM Backstage: Improper input validation in Confluence to Markdown scaffolder module
CVE-2026-106563 5.3 MEDIUM Backstage: Improper entity validation in deprecated Kubernetes services endpoint
CVE-2026-106561 5.0 MEDIUM Backstage: Sensitive information disclosure in Kubernetes resource queries
CVE-2026-106562 4.3 MEDIUM Backstage: Incorrect authorization in search engine permission filtering

IV. Related Vulnerabilities

Same product: backstage
Same vendor: backstage
Same weakness: CWE-183

V. Comments for CVE-2026-106510

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