CVE-2026-106463

Backstage: Improper authorization in GitLab organizational user ingestion

MEDIUM
5.4
CVSS Score
Published: October 6, 2026 at 08:32 PM UTC
Updated: October 22, 2026 at 06:52 PM UTC
4 products affected across 2 vendorsBackstagebackstage\/plugin-catalog-backend-module-gitlabBackstage

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Severity
MEDIUM5.4
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

Backstage is an open framework for building developer portals. Prior to 0.8.7, the @backstage/plugin-catalog-backend-module-gitlab package is affected by improper authorization in gitlab organizational user ingestion. Deployments 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. This issue is fixed in version 0.8.7.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

References (3)

x_refsource_CONFIRMMitigationVendor Advisory
Source: cverecord
https://github.com/backstage/backstage/security/advisories/GHSA-gp6m-x9vw-5c5x
x_refsource_MISCPatchRelease Notes
Source: cverecord
https://github.com/backstage/backstage/releases/tag/v1.54.6

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.4MEDIUMGitHub_M
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-863

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