GitHub Advisoryadvisory · npm
GHSA-qmw3-745m-w99g Backstage: Improper validation of TechDocs MkDocs configuration
HIGH
Official page ↗
- Aliases
- CVE-2026-106558
- Ecosystem
- npm
- Packages
- @backstage/plugin-techdocs-node
- Severity
- High
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-502
- Reviewed
- 2026-10-07
Affected packages
• npm @backstage/plugin-techdocs-node: < 1.15.4 → fixed in 1.15.4
Description
Impact
An attacker who can provide configuration to a TechDocs build may execute code in the generator runtime. Impact is greatest when documentation generation runs with backend credentials or host access.
Patches
Patched in `@backstage/plugin-techdocs-node` version `1.15.4`.
Workarounds
Use external TechDocs generation in an isolated environment without sensitive credentials or host access. Restrict and review changes to documentation configuration before generation.
Related
Alias · CVE (1)
- CVE-2026-106558 Backstage is an open framework for building developer portals. vulnerability
Weakness · CWE (1)
- CWE-502 Deserialization of Untrusted Data weakness
References
- https://github.com/backstage/backstage/security/advisories/GHSA-qmw3-745m-w99g web
- https://nvd.nist.gov/vuln/detail/CVE-2026-106558 advisory
- https://github.com/backstage/backstage/commit/32723a0fe4e12ed80535fc65d5331765c55aa91b web
- https://github.com/backstage/backstage/commit/944edb51c8524d3664b18f2d57ba101b1c93b709 web
- https://github.com/backstage/backstage/commit/f18e9abcc6051491862b15e4fc60e69f8d52310c web
- https://github.com/backstage/backstage package
- https://github.com/backstage/backstage/releases/tag/v1.50.7 web
- https://github.com/backstage/backstage/releases/tag/v1.54.9 web
- https://github.com/backstage/backstage/releases/tag/v1.55.2 web