CVE-2026-106494

medium

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.

References

https://github.com/backstage/backstage/security/advisories/GHSA-7649-wm97-w3j3

https://github.com/backstage/backstage/releases/tag/v1.54.6

https://github.com/backstage/backstage/commit/14e925ce5b905dd8daa64c3009722febda76034c

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-94015

Details

Source: Mitre, NVD

Published: 2026-10-06

Updated: 2026-10-07

Risk Information

CVSS v2

Base Score: 4.6

Vector: CVSS2#AV:N/AC:H/Au:M/C:N/I:C/A:N

Severity: Medium

CVSS v3

Base Score: 4.4

Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N

Severity: Medium

EPSS

EPSS: 0.00286