CVE-2026-106494
Published:October 06, 2026
Updated:October 09, 2026
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 Packages
https://github.com/backstage/backstage.git (GITHUB):
Affected version(s) >=v1.0.0 <v1.54.6Fix Suggestion:
Update to version v1.54.6@backstage/backend-defaults (NPM):
Affected version(s) >=0.3.0-next.3 <0.17.8Fix Suggestion:
Update to version 0.17.8@backstage/backend-defaults (NPM):
Affected version(s) >=0.0.0-nightly-20220811024336 <0.17.8Fix Suggestion:
Update to version 0.17.8Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
5.9
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
HIGH
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.4
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
EPSS
Base Score:
0.29