Description
Backstage is an open framework for building developer portals. Prior to 1.15.4, the @backstage/plugin-techdocs-node package is affected by potential file exposure through local techdocs publisher. 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. This issue is fixed in version 1.15.4.
Published: 2026-10-06
Score: 5.3 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-cm77-ch27-6w6v Backstage has potential file exposure through local TechDocs publisher
History

Fri, 09 Oct 2026 18:00:00 +0000

Type Values Removed Values Added
First Time appeared Linuxfoundation
Linuxfoundation backstage
Linuxfoundation backstage Plugin-techdocs-node
CPEs cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:backstage_plugin-techdocs-node:*:*:*:*:*:*:*:*
Vendors & Products Linuxfoundation
Linuxfoundation backstage
Linuxfoundation backstage Plugin-techdocs-node

Fri, 09 Oct 2026 09:15:00 +0000

Type Values Removed Values Added
First Time appeared Backstage
Backstage backstage
Backstage plugin-techdocs-node
Vendors & Products Backstage
Backstage backstage
Backstage plugin-techdocs-node

Fri, 09 Oct 2026 02:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 06 Oct 2026 22:00:00 +0000

Type Values Removed Values Added
Description Backstage is an open framework for building developer portals. Prior to 1.15.4, the @backstage/plugin-techdocs-node package is affected by potential file exposure through local techdocs publisher. 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. This issue is fixed in version 1.15.4.
Title Backstage: Potential file exposure through local TechDocs publisher
Weaknesses CWE-22
CWE-59
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N'}


Subscriptions

Backstage Backstage Plugin-techdocs-node
Linuxfoundation Backstage Backstage Plugin-techdocs-node
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-09T01:56:38.002Z

Reserved: 2026-10-06T18:46:47.767Z

Link: CVE-2026-106508

cve-icon Vulnrichment

Updated: 2026-10-09T01:56:33.992Z

cve-icon NVD

Status : Analyzed

Published: 2026-10-06T22:17:06.310

Modified: 2026-10-09T17:44:55.037

Link: CVE-2026-106508

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-09T08:30:59Z

Weaknesses
  • CWE-22

    Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

  • CWE-59

    Improper Link Resolution Before File Access ('Link Following')