Vulnerability Details CVE-2026-106494
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 19.8%
CVSS Severity
CVSS v3 Score 4.4