Backstage: Improper input validation in cloud storage URL readers
Impact
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.
Patches
Patched in @backstage/backend-defaults version 0.17.8
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | @backstage/backend-defaults | < 0.17.8 | 0.17.8 |
References
- https://github.com/backstage/backstage/security/advisories/GHSA-7649-wm97-w3j3
- https://nvd.nist.gov/vuln/detail/CVE-2026-106494
- https://github.com/backstage/backstage/commit/14e925ce5b905dd8daa64c3009722febda76034c
- https://github.com/backstage/backstage
- https://github.com/backstage/backstage/releases/tag/v1.54.6
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N- Weakness (CWE)
CWE-22, CWE-73- Platform
- npm
- Package
@backstage/backend-defaults- Disclosed
- 07.10.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-7649-wm97-w3j3 - CC BY 4.0
Vulnerability history: @backstage/backend-defaults
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 6
- First → latest
- 01.2026 10.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 2
- Medium 2
- Low 2
Disclosures per year
- 2026: 6
-
Backstage: Improper input validation in cloud storage URL readers this entry
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