Backstage is an open framework for building developer portals. Prior to 0.17.8, the @backstage/backend-defaults package is affected by improper input validation in cloud storage url readers. An attacker with write access to a cloud storage bucket used by Backstage could craft object names that could collide with protected files in the output directory. In certain deployment configurations, this could lead to content injection. This issue is fixed in version 0.17.8.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-7649-wm97-w3j3 Backstage: Improper input validation in cloud storage URL readers
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

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

Type Values Removed Values Added
First Time appeared Backstage
Backstage backend-defaults
Backstage backstage
Vendors & Products Backstage
Backstage backend-defaults
Backstage backstage

Thu, 08 Oct 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Wed, 07 Oct 2026 12:30:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Tue, 06 Oct 2026 21:00:00 +0000

Type Values Removed Values Added
Description Backstage is an open framework for building developer portals. Prior to 0.17.8, the @backstage/backend-defaults package is affected by improper input validation in cloud storage url readers. An attacker with write access to a cloud storage bucket used by Backstage could craft object names that could collide with protected files in the output directory. In certain deployment configurations, this could lead to content injection. This issue is fixed in version 0.17.8.
Title Backstage: Improper input validation in cloud storage URL readers
Weaknesses CWE-22
CWE-73
References
Metrics cvssV3_1

{'score': 4.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-07T15:32:00.720Z

Reserved: 2026-10-06T18:46:47.766Z

Link: CVE-2026-106494

cve-icon Vulnrichment

Updated: 2026-10-07T15:31:56.446Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-06T21:17:18.520

Modified: 2026-10-07T16:17:39.403

Link: CVE-2026-106494

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-06T20:54:14Z

Links: CVE-2026-106494 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-09T08:31:12Z

Weaknesses