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OpenAdvisories
Medium · 4.4 CVE-2026-106494 EUVD-2026-94015GHSA-7649-wm97-w3j3

Backstage: Improper input validation in cloud storage URL readers

Published Oct 6, 2026 · Updated Oct 7, 2026 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
backstage backstage < 1.54.6 —
@backstage backend-defaults < 0.17.8 —

Affected packages

EcosystemPackageAffectedFixedRecord
npm @backstage/backend-defaults < 0.17.8 0.17.8 GHSA-7649-wm97-w3j3

References