CVE-2026-106463: @backstage/plugin catalog backend module gitlab Backstage Has Improper Authorization Vulnerability
MODERATECVE-2026-106463 is a MODERATE (CVSS 5.4) backstage has improper authorization vulnerability (CWE-863: Incorrect Authorization) affecting @backstage/plugin catalog backend module gitlab libraries in the npm ecosystem. The issue involves backstage has improper authorization in gitlab organizational user ingestion. Remediation is available by upgrading affected packages to version 0.8.7.
CVE-2026-106463 at a Glance
Security Impact
CVSS: 5.4
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N).
How to Fix CVE-2026-106463
To remediate this vulnerability, upgrade all affected @backstage/plugin catalog backend module gitlab 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-gitlab@0.8.7Run the following command in your project directory to verify that all resolved dependencies use the patched release:
npm ls @backstage/plugin-catalog-backend-module-gitlabHow to Check if You Are Affected
To determine whether your Node.js application is affected by CVE-2026-106463, inspect your project dependencies using npm:
npm ls @backstage/plugin-catalog-backend-module-gitlabAnalyze the terminal output to locate any version of @backstage/plugin catalog backend module gitlab in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.8.7), your application is affected.
Note: The npm ls @backstage/plugin-catalog-backend-module-gitlab 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-863: Incorrect Authorization, where the product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. In @backstage/plugin catalog backend module gitlab, 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-2026-106463 Affected @backstage/plugin catalog backend module gitlab Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
@backstage/plugin-catalog-backend-module-gitlab
|
npm |
< 0.8.7
|
0.8.7
|
References
Frequently Asked Questions
What is CVE-2026-106463?
Which @backstage/plugin catalog backend module gitlab versions are affected?
What version fixes CVE-2026-106463?
Is @backstage/plugin-catalog-backend-module-gitlab affected?
What is the CVSS score of CVE-2026-106463?
What CWE is associated with CVE-2026-106463?
How can I check npm dependencies for CVE-2026-106463?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-gp6m-x9vw-5c5x",
"modified" : "2026-10-07T18:01:39Z",
"published" : "2026-10-07T18:01:39Z",
"aliases" : [ "CVE-2026-106463" ],
"summary" : "Backstage has improper authorization in GitLab organizational user ingestion",
"details" : "### Impact\n\nDeployments that enable GitLab organization event ingestion and rely on scoped catalog users as an access boundary may admit an unintended catalog identity. Depending on sign-in and permission configuration, this may allow unauthorized access with the permissions of a standard authenticated user.\n\n### Patches\n\n- Upgrade `@backstage/plugin-catalog-backend-module-gitlab` to version `0.8.7`.\n\n### Workarounds\n\n- Disable event-driven GitLab organization ingestion and rely on scheduled discovery until upgrading.\n- Enforce organization membership independently at the authenticating proxy or sign-in resolver.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "npm",
"name" : "@backstage/plugin-catalog-backend-module-gitlab"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "0.8.7"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/backstage/backstage/security/advisories/GHSA-gp6m-x9vw-5c5x"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-106463"
}, {
"type" : "WEB",
"url" : "https://github.com/backstage/backstage/commit/c211b4b67d28efd2f4fac63e35e2ac515e305cb3"
}, {
"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-863" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2026-10-07T18:01:39Z",
"nvd_published_at" : "2026-10-06T21:17:17Z"
}
}