CVE-2026-106455
Description
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
Propose a mitigation on Community Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
References
- 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://github.com/backstage/backstage/security/advisories/GHSA-q38j-6vcm-2f5m
CWEs
CWE-918
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.