CVE-2026-25153: @backstage/plugin-techdocs-node vulnerable to arbitrary code execution via MkDocs hooks

February 2, 2026

When TechDocs is configured with runIn: local, a malicious actor who can submit or modify a repository’s mkdocs.yml file can execute arbitrary Python code on the TechDocs build server via MkDocs hooks configuration.

References

github.com/advisories/GHSA-6jr7-99pf-8vgf
github.com/backstage/backstage
github.com/backstage/backstage/security/advisories/GHSA-6jr7-99pf-8vgf
nvd.nist.gov/vuln/detail/CVE-2026-25153

Code Behaviors & Features

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