CVE-2026-106455
CVE-2026-106455 · Backstage: Improper validation of MkDocs plugin configuration in TechDocs
This page contains facts from public vulnerability sources. Check the original advisory before updating.
Backstage is an open framework for building developer portals. From 0.11.12 until 1.14.7 and 1.15.5, the @backstage/plugin-techdocs-node package is affected by improper validation of mkdocs plugin configuration in techdocs. An authenticated attacker with control over a TechDocs source repository could cause a documentation build to retrieve and publish data from network locations reachable by the build environment. Exposure depends on deployment topology, build mode, and target endpoint protections. Modern cloud metadata services that require tokens or special headers are not directly accessible through the affected behavior. This issue is fixed in @backstage/plugin-techdocs-node versions 1.14.7 and 1.15.5.
CVSS 7.7 · High · EPSS 0.3% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
backstage
- Versions
- >= 0.71.1, < 1.50.6: Affected
- >= 1.51.0-next.0, < 1.54.8: Affected
No fix published
plugin-techdocs-node
- Versions
- >= 0.11.12, < 1.14.7: Affected
- >= 1.15.0, < 1.15.5: Affected
No fix published
@backstage/plugin-techdocs-node npm
- Affected ranges
- SEMVER: ≥ 0.11.12, < 1.14.7
Update to 1.14.7
@backstage/plugin-techdocs-node npm
- Affected ranges
- SEMVER: ≥ 1.15.0, < 1.15.5
Update to 1.15.5
Original sources
- https://github.com/backstage/backstage/security/advisories/GHSA-q38j-6vcm-2f5m
- https://github.com/backstage/backstage/commit/28aa82ae2815988721dd7bbf43cd69c431dcd71b
- https://github.com/backstage/backstage/commit/9f76ea445088961f68c364764cc4b7734f368fc0
- https://github.com/backstage/backstage/releases/tag/v1.50.6
- https://github.com/backstage/backstage/releases/tag/v1.54.8
- https://github.com/backstage/backstage/releases/tag/v1.55.0
- https://nvd.nist.gov/vuln/detail/CVE-2026-106455