Medium severity · published Oct 6, 2026
CVE-2026-106463
Backstage: Improper authorization in GitLab organizational user ingestion
5.4
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 7% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BA
backstage · backstage
< 1.54.6 · source: vendor, NVD
PL
plugin-catalog-backend-module-gitlab · @backstage
< 0.8.7 · source: vendor
BA
Backstage/plugin-catalog-backend-module-gitlab · Linuxfoundation
before 0.8.7 · source: NVD
Affected product
PL
plugin-catalog-backend-module-gitlab
@backstage
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-106463
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-106463
x_refsource_CONFIRM
https://github.com/backstage/backstage/security/advisories/GHSA-gp6m-x9vw-5c5x
x_refsource_MISC
https://github.com/backstage/backstage/commit/c211b4b67d28efd2f4fac63e35e2ac515e305cb3
x_refsource_MISC
https://github.com/backstage/backstage/releases/tag/v1.54.6
