All vulnerabilities
CVE-2026-106557GHSA-f7v3-xhm6-w245

@backstage/plugin-techdocs-node: Backstage has improper input validation in TechDocs Markdown extension configuration

backstage @backstage/plugin-techdocs-nodenpmLibraries & packages
Open in ThreatlineRecord JSON
CVSS
7.7High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.30%Chance of exploitation activity in the next 30 days, higher than 21% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in1.15.4Fixed versionGitHub
Published7 Oct 2026Updated 7 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

An authenticated user who can register or modify documentation sources may cause a TechDocs build to access resources outside the intended documentation boundary. Depending on deployment configuration, this may expose sensitive backend-host data or internal network resources.

Patches

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

Adopters must also use pymdown-extensions version 10.21.3 or newer, normally through mkdocs-techdocs-core version 1.7.0 or newer. @backstage/plugin-techdocs-node does not control the Python dependencies used by the generator; with an older PyMdown release, snippets may remain vulnerable to file inclusion even after their configuration is sanitized.

Workarounds

  • Generate TechDocs only from trusted repositories with reviewed MkDocs configuration.
  • Use isolated build environments with restricted filesystem access and network egress.
  • Prefer externally generated TechDocs with appropriately sandboxed CI.

Text from GitHub Advisory Database

Affected versions 6

  • @backstage/plugin-techdocs-node, npm< 1.15.4GitHub
  • backstageaffected: < 1.50.5CVE List
  • backstageaffected: >= 1.51.0-next.0, < 1.54.6CVE List
  • plugin-techdocs-nodeaffected: < 1.14.6CVE List
  • plugin-techdocs-nodeaffected: >= 1.15.0, < 1.15.4CVE List
  • @backstage/plugin-techdocs-node, npmfrom first release, fixed in 1.15.4OSV

References 6