Vulnerability · Published Oct 6, 2026 · Assigned by GitHub_M
CVE-2026-106493Backstage: Cloud storage catalog locations may cross configured storage boundaries
Low 3.0
In plain English
A low-severity path traversal in backstage from backstage. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Backstage is an open framework for building developer portals. Prior to 1.54.6, cloud storage catalog providers did not sufficiently validate object paths. A principal able to create or rename objects in a configured Azure Blob Storage or AWS S3 catalog source could cause catalog descriptors to be read from outside the intended storage boundary, limited to locations reachable with the backend's configured credentials. This issue is fixed in 1.54.6.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | @backstage/backend-defaults | 0.17.8 | GHSA-xvh9-35w9-42m4 |
| npm | @backstage/plugin-catalog-backend-module-aws | 0.4.27 | GHSA-xvh9-35w9-42m4 |
| npm | @backstage/plugin-catalog-backend-module-azure | 0.3.21 | GHSA-xvh9-35w9-42m4 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| backstage | backstage | < 1.54.6 |
| @backstage | plugin-catalog-backend-module-azure | < 0.17.8 |
| @backstage | plugin-catalog-backend-module-aws | < 0.4.27 |
| @backstage | plugin-catalog-backend-module-azure | < 0.3.21 |
Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:N/A:N