CVE-2026-106557: Backstage has improper input validation in TechDocs Markdown extension configuration
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.
References
- github.com/advisories/GHSA-f7v3-xhm6-w245
- github.com/backstage/backstage/commit/017ace52d9b327ededc6704cf17799c875ae0f29
- github.com/backstage/backstage/commit/2d9de4ca117a529de4b6ed7dfb7aa507ca7b3f91
- github.com/backstage/backstage/releases/tag/v1.50.5
- github.com/backstage/backstage/releases/tag/v1.54.6
- github.com/backstage/backstage/security/advisories/GHSA-f7v3-xhm6-w245
- nvd.nist.gov/vuln/detail/CVE-2026-106557
Code Behaviors & Features
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