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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-106510
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-07 15:17:12 UTC
Updated2026-10-07 15:52:18 UTC
DescriptionBackstage 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.

Risk And Classification

Primary CVSS: v3.1 7.7 HIGH from [email protected]

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L

Problem Types: CWE-183 | CWE-470 | CWE-183 CWE-183: Permissive List of Allowed Inputs | CWE-470 CWE-470: Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.7HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L
3.1CNADECLARED7.7HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
Low
Availability
Low

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Backstage Backstage affected < 1.50.5 Not specified
CNA Backstage Backstage affected >= 1.51.0-next.0, < 1.54.6 Not specified
CNA @backstage Plugin-techdocs-node affected < 1.14.6 Not specified
CNA @backstage Plugin-techdocs-node affected >= 1.15.0, < 1.15.4 Not specified

References

ReferenceSourceLinkTags
github.com/backstage/backstage/commit/02cd7cdbb18b687446277b5602adaee7f1... [email protected] github.com
github.com/backstage/backstage/security/advisories/GHSA-4488-j8vj-vqqv [email protected] github.com
github.com/backstage/backstage/releases/tag/v1.50.5 [email protected] github.com
github.com/backstage/backstage/commit/a900a9953c8f7ad3ba1906d1d257725a99... [email protected] github.com
github.com/backstage/backstage/releases/tag/v1.54.6 [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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