GHSA-cm77-ch27-6w6v

Source

https://github.com/advisories/GHSA-cm77-ch27-6w6v

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-cm77-ch27-6w6v/GHSA-cm77-ch27-6w6v.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-cm77-ch27-6w6v

Aliases

CVE-2026-106508

Published

2026-10-07T16:23:46Z

Modified

2026-10-07T16:30:06Z

Severity

5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N CVSS Calculator

Summary

Backstage has potential file exposure through local TechDocs publisher

Details

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)

Database specific

{
    "cwe_ids": [
        "CWE-22",
        "CWE-59"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-07T16:23:46Z",
    "nvd_published_at": "2026-10-06T22:17:06Z",
    "severity": "MODERATE"
}

References

Affected packages

npm / @backstage/plugin-techdocs-node

Package

Name: @backstage/plugin-techdocs-node; View open source insights on deps.dev
Purl: pkg:npm/%40backstage/plugin-techdocs-node

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

1.15.4

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-cm77-ch27-6w6v/GHSA-cm77-ch27-6w6v.json"