CVE-2026-106493: Backstage Cloud Storage Catalog Locations May Vulnerability
LOWCVE-2026-106493 is a LOW (CVSS 3.0) cloud storage catalog locations may vulnerability (CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')) affecting Backstage libraries in the npm ecosystem. The issue involves cloud storage catalog locations may cross configured storage boundaries. Remediation is available by upgrading affected packages to version 0.3.21, 0.4.27, 0.17.8.
CVE-2026-106493 at a Glance
Security Impact
CVSS: 3.0
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:N/A:N).
How to Fix CVE-2026-106493
To remediate this vulnerability, upgrade all affected Backstage dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
npm install @backstage/plugin-catalog-backend-module-azure@0.3.21npm install @backstage/plugin-catalog-backend-module-aws@0.4.27npm install @backstage/backend-defaults@0.17.8Run the following command in your project directory to verify that all resolved dependencies use the patched release:
npm ls @backstage/plugin-catalog-backend-module-azureHow to Check if You Are Affected
To determine whether your Node.js application is affected by CVE-2026-106493, inspect your project dependencies using npm:
npm ls @backstage/plugin-catalog-backend-module-azureAnalyze the terminal output to locate any version of Backstage in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.3.21), your application is affected.
Note: The npm ls @backstage/plugin-catalog-backend-module-azure command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'), where the product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. In Backstage, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2026-106493 Affected Backstage Versions
3 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
@backstage/plugin-catalog-backend-module-azure
|
npm |
< 0.3.21
|
0.3.21
|
|
@backstage/plugin-catalog-backend-module-aws
|
npm |
< 0.4.27
|
0.4.27
|
|
@backstage/backend-defaults
|
npm |
< 0.17.8
|
0.17.8
|
References
Frequently Asked Questions
What is CVE-2026-106493?
Which Backstage versions are affected?
What version fixes CVE-2026-106493?
Is @backstage/plugin-catalog-backend-module-azure affected?
Is @backstage/plugin-catalog-backend-module-aws affected?
What is the CVSS score of CVE-2026-106493?
What CWE is associated with CVE-2026-106493?
How can I check npm dependencies for CVE-2026-106493?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-xvh9-35w9-42m4",
"modified" : "2026-10-07T17:59:55Z",
"published" : "2026-10-07T17:59:55Z",
"aliases" : [ "CVE-2026-106493" ],
"summary" : "Backstage: Cloud storage catalog locations may cross configured storage boundaries",
"details" : "### Impact\n\nCatalog entity providers for Azure Blob Storage and AWS S3 did not sufficiently validate storage object paths, which could allow catalog descriptors to be read from outside the intended storage boundary. Access is limited to locations reachable by the backend's configured credentials.\n\n### Patches\n\n- `@backstage/plugin-catalog-backend-module-azure` version `0.3.21`\n- `@backstage/plugin-catalog-backend-module-aws` version `0.4.27`\n- `@backstage/backend-defaults` version `0.7.18`\n\n### Workarounds\n\n- Restrict blob and object creation or renaming in configured catalog storage sources to trusted principals.\n- Scope Backstage's Azure and AWS reader credentials and network access to the intended storage boundaries.\n- Disable an affected catalog provider if those restrictions cannot be enforced.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:N/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "npm",
"name" : "@backstage/plugin-catalog-backend-module-azure"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "0.3.21"
} ]
} ]
}, {
"package" : {
"ecosystem" : "npm",
"name" : "@backstage/plugin-catalog-backend-module-aws"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "0.4.27"
} ]
} ]
}, {
"package" : {
"ecosystem" : "npm",
"name" : "@backstage/backend-defaults"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "0.17.8"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/backstage/backstage/security/advisories/GHSA-xvh9-35w9-42m4"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-106493"
}, {
"type" : "WEB",
"url" : "https://github.com/backstage/backstage/commit/47ddbd8b4a3efd812309f759c38f4877fbd9e5ff"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/backstage/backstage"
}, {
"type" : "WEB",
"url" : "https://github.com/backstage/backstage/releases/tag/v1.54.6"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-22" ],
"severity" : "LOW",
"github_reviewed" : true,
"github_reviewed_at" : "2026-10-07T17:59:55Z",
"nvd_published_at" : "2026-10-06T21:17:18Z"
}
}