CVE-2026-106496

Backstage: Inconsistent enforcement of allowed location types during catalog processing

Published Oct 6, 2026 CVSS 3.1 · 3.1 Low EPSS < 1% KEV · Not listed
Description
Backstage is an open framework for building developer portals. Prior to 3.9.1, the @backstage/plugin-catalog-backend package is affected by inconsistent enforcement of allowed location types during catalog processing. Under certain configurations, the catalog backend could process location types that were not intended to be allowed, potentially leading to unintended file access on the backend host. This issue is fixed in version 3.9.1.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-pcmq-25r3-5w9v Backstage: Inconsistent enforcement of allowed location types during catalog processing
History
Type Values Removed Values Added
First Time appeared Linuxfoundation
Linuxfoundation backstage
Linuxfoundation backstage Plugin-catalog-backend
CPEs cpe:2.3:a:linuxfoundation:backstage:*:*:*:*:*:*:*:*
cpe:2.3:a:linuxfoundation:backstage_plugin-catalog-backend:*:*:*:*:*:node.js:*:*
Vendors & Products Linuxfoundation
Linuxfoundation backstage
Linuxfoundation backstage Plugin-catalog-backend
Type Values Removed Values Added
First Time appeared Backstage
Backstage backstage
Backstage plugin-catalog-backend
Vendors & Products Backstage
Backstage backstage
Backstage plugin-catalog-backend
Type Values Removed Values Added
Metrics ssvc

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

Type Values Removed Values Added
Description Backstage is an open framework for building developer portals. Prior to 3.9.1, the @backstage/plugin-catalog-backend package is affected by inconsistent enforcement of allowed location types during catalog processing. Under certain configurations, the catalog backend could process location types that were not intended to be allowed, potentially leading to unintended file access on the backend host. This issue is fixed in version 3.9.1.
Title Backstage: Inconsistent enforcement of allowed location types during catalog processing
Weaknesses CWE-22
CWE-863
References
Metrics cvssV3_1

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

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Oct 7, 2026, 5:06 PM
Reserved
Oct 6, 2026, 6:46 PM
Status
Analyzed
Published
Oct 6, 2026, 10:17 PM
Modified
Oct 16, 2026, 3:33 PM
Severity
Low
Public date
Oct 6, 2026, 9:17 PM