Backstage has potential file exposure through local TechDocs publisher
Impact
When using the local TechDocs publisher (techdocs.publisher.type: 'local'), it was possible for the documentation serving endpoint to follow filesystem references outside the intended documentation tree, potentially exposing host files to authenticated users.
This is mitigated by the fact that exploration requires preconditions that do not arise through normal MkDocs operation. Cloud-based publishers (S3, GCS, Azure Blob Storage) are not affected.
Patches
Patched in @backstage/plugin-techdocs-node version 1.15.4
Workarounds
If you cannot upgrade immediately, consider switching to an external store for published TechDocs content (e.g. awsS3, googleGcs, or azureBlobStorage publishers)
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | @backstage/plugin-techdocs-node | < 1.15.4 | 1.15.4 |
References
- https://github.com/backstage/backstage/security/advisories/GHSA-cm77-ch27-6w6v
- https://nvd.nist.gov/vuln/detail/CVE-2026-106508
- https://github.com/backstage/backstage/commit/6aecb26f337ffec1d4e67ce903cf1e39b6082ec4
- https://github.com/backstage/backstage
- https://github.com/backstage/backstage/releases/tag/v1.54.6
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N- Weakness (CWE)
CWE-22, CWE-59- Platform
- npm
- Package
@backstage/plugin-techdocs-node- Disclosed
- 07.10.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-cm77-ch27-6w6v - CC BY 4.0
Vulnerability history: @backstage/plugin-techdocs-node
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 11
- First → latest
- 06.2022 10.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 8
- Medium 3
Disclosures per year
- 2022: 1
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 10
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Backstage has potential file exposure through local TechDocs publisher this entry
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