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Findings

CVE-2026-88064

Backstage is an open framework for building developer portals.

Published Sep 16, 2026 · updated Oct 14, 2026 · linuxfoundation backstage plugin-techdocs-node

Backstage is an open framework for building developer portals. Prior to 1.14.6 and from 1.15.0 until 1.15.4, the @backstage/plugin-techdocs-node package insufficiently validates mkdocs.yml supplied by an authenticated user who can register or modify a TechDocs source. Unsafe Python YAML tags, markdown_extensions names and configuration, theme options, and extra_templates values can reach the documentation generator and cause unintended code execution. The resulting impact is limited to the files, credentials, network access, and other resources available to the TechDocs backend or build container. This issue is fixed in versions 1.14.6 and 1.15.4.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 16, 2026 · NIST NVD

    Detected

    Backstage is an open framework for building developer portals. Prior to 1.14.6 and from 1.15.0 until 1.15.4, the @backstage/plugin-techdocs-node package insufficiently validates mkdocs.yml supplied by an authenticated user who can register or modify a TechDocs source. Unsafe Python YAML tags, markdown_extensions names and configuration, theme options, and extra_templates values can reach the docum

  2. Oct 14, 2026 · NIST NVD

    Updated

    Backstage is an open framework for building developer portals. Prior to 1.14.6 and from 1.15.0 until 1.15.4, the @backstage/plugin-techdocs-node package insufficiently validates mkdocs.yml supplied by an authenticated user who can register or modify a TechDocs source. Unsafe Python YAML tags, markdown_extensions names and configuration, theme options, and extra_templates values can reach the docum

Affected

  • cpe linuxfoundation/backstageversion unspecified
  • cpe linuxfoundation/backstage plugin-techdocs-nodeversion unspecified

Sources

  • CVE.orgCVE-2026-88064

    Official CVE identifier

    cve.org
  • NIST NVDCVE-2026-88064

    Backstage is an open framework for building developer portals. Prior to 1.14.6 and from 1.15.0 until 1.15.4, the @backstage/plugin-techdocs-node package insufficiently validates mkdocs.yml supplied by an authenticated user who can register or modify a TechDocs source. Unsafe Pyth

    nvd.nist.gov

References