All vulnerabilities
CVE-2026-106508GHSA-cm77-ch27-6w6v

@backstage/plugin-techdocs-node: Backstage has potential file exposure through local TechDocs publisher

backstage @backstage/plugin-techdocs-nodenpmLibraries & packages
Open in ThreatlineRecord JSON
CVSS
5.3Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.39%Chance of exploitation activity in the next 30 days, higher than 31% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in1.15.4Fixed versionGitHub
Published6 Oct 2026Updated 9 Oct 2026CVE List

What fixes it

  • 1.15.4@backstage/plugin-techdocs-node, npmGitHubnpm install @backstage/plugin-techdocs-node@1.15.4

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

Impact

When using the local TechDocs publisher (techdocs.publisher.type: 'local'), it was possible for the documentation serving endpoint to follow filesystem references outside the intended documentation tree, potentially exposing host files to authenticated users.

This is mitigated by the fact that exploration requires preconditions that do not arise through normal MkDocs operation. Cloud-based publishers (S3, GCS, Azure Blob Storage) are not affected.

Patches

Patched in @backstage/plugin-techdocs-node version 1.15.4

Workarounds

If you cannot upgrade immediately, consider switching to an external store for published TechDocs content (e.g. awsS3, googleGcs, or azureBlobStorage publishers)

Text from GitHub Advisory Database

Affected versions 4

  • @backstage/plugin-techdocs-node, npm< 1.15.4GitHub
  • backstageaffected: < 1.54.6CVE List
  • plugin-techdocs-nodeaffected: < 1.15.4CVE List
  • @backstage/plugin-techdocs-node, npmfrom first release, fixed in 1.15.4OSV

References 5