7.7

CVE-2026-106510

Backstage: Remote code execution via crafted markdown_extensions in TechDocs mkdocs.yml

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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
Herstellerbackstage
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Produkt backstage
Version < 1.50.5
Status affected
Version >= 1.51.0-next.0, < 1.54.6
Status affected
Hersteller@backstage
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Produkt plugin-techdocs-node
Version < 1.14.6
Status affected
Version >= 1.15.0, < 1.15.4
Status affected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
security-advisories@github.com 7.7 1.8 5.3
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L
CWE-183 Permissive List of Allowed Inputs

The product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are explicitly allowed by policy because the inputs are assumed to be safe, but the list is too permissive - that is, it allows an input that is unsafe, leading to resultant weaknesses.

CWE-470 Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')

The product uses external input with reflection to select which classes or code to use, but it does not sufficiently prevent the input from selecting improper classes or code.

https://github.com/backstage/backstage/commit/02cd7cdbb18b687446277b5602adaee7f1d53cbb
https://github.com/backstage/backstage/commit/a900a9953c8f7ad3ba1906d1d257725a9996cc9d
https://github.com/backstage/backstage/releases/tag/v1.50.5
https://github.com/backstage/backstage/releases/tag/v1.54.6
https://github.com/backstage/backstage/security/advisories/GHSA-4488-j8vj-vqqv