7.7

CVE-2026-106557

Backstage: Improper input validation in TechDocs Markdown extension configuration

Backstage is an open framework for building developer portals. Prior to 1.14.6 and 1.15.4, the @backstage/plugin-techdocs-node package did not sufficiently validate TechDocs Markdown extension configuration. An authenticated user who can register or modify documentation sources may cause a TechDocs build to access resources outside the intended documentation boundary, potentially exposing backend-host data or internal network resources. This issue is fixed in versions 1.14.6 and 1.15.4 when pymdown-extensions 10.21.3 or later is also used, normally through mkdocs-techdocs-core 1.7.0 or later.
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 3.1 4
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

CWE-918 Server-Side Request Forgery (SSRF)

The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

https://github.com/backstage/backstage/commit/017ace52d9b327ededc6704cf17799c875ae0f29
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-f7v3-xhm6-w245
https://github.com/backstage/backstage/commit/2d9de4ca117a529de4b6ed7dfb7aa507ca7b3f91