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CVE-2026-29186

@backstage/plugin-techdocs-node: TechDocs Mkdocs Configuration Key Enables Arbitrary Code Execution

Published: Mar 7, 2026Updated: Mar 11, 2026 Sources: CVE List NVD GHSACWE-74
NVD MITRE
7.7CVSSHIGH
EPSS Score
0.5%
Top 62.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Backstage is an open framework for building developer portals. Prior to version 1.14.3, this is a configuration bypass vulnerability that enables arbitrary code execution. The @backstage/plugin-techdocs-node package uses an allowlist to filter dangerous MkDocs configuration keys during the documentation build process. A gap in this allowlist allows attackers to craft an mkdocs.yml that causes arbitrary Python code execution, completely bypassing TechDocs' security controls. This issue has been patched in version 1.14.3.

CVSS Vector Breakdown

AV:NAC:HPR:LUI:NS:CC:HI:LA:L
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:LIntegrity
Low
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

CWE-74CWE-434

Affected Products

backstagebackstage
SaaS
DevTools & CI / source-control
@backstage/plugin-techdocs-nodenpmOSS Libraries
backstage plugin-techdocs-nodelinuxfoundation
Mixed
AI / ML / ml-framework
backstagecommercialDevTools & CI
npmpackage-ecosystemOSS Libraries
linuxfoundationoss-projectUSAI / MLaka yocto, pytorch, everest

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

4 techniques
Command and Control
Execution
Initial Access
Persistence
View detailed technique mapping

References

https://github.com/backstage/backstage/security/advisories/GHSA-928r-fm4v-mvrw
github.com
https://nvd.nist.gov/vuln/detail/CVE-2026-29186
nvd.nist.gov
https://backstage.io/docs/features/techdocs/architecture
backstage.io
and 3 more references View all →

Timeline

Published
Mar 7, 2026
Last Updated
Mar 11, 2026

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