CVE-2026-106497

Backstage is an open framework for building developer portals. Prior to 3.9.1, the @backstage/plugin-catalog-backend package is affected by inconsistent catalog property permission evaluation. In deployments that use affected value-based catalog permission conditions as a confidentiality boundary, an authenticated user could receive catalog entity data that policy authors intended to restrict. This issue is fixed in version 3.9.1.

CVSS 3.1

4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS

0.2% chance of exploitation in the next 30 days; higher than 8% of CVEs (scores of 2026-10-25)

CWEs

CWE-178, CWE-863

Published

2026-10-06

Modified

2026-10-16

Record from

the NVD, synced 2026-10-19

Affected

• linuxfoundation:backstage
• linuxfoundation:backstage_plugin-catalog-backend

References

• https://github.com/backstage/backstage/commit/21424faa2e280a6bc6b9e5c5245952f16aafca7b
• https://github.com/backstage/backstage/releases/tag/v1.54.6
• https://github.com/backstage/backstage/security/advisories/GHSA-8429-xpcj-3cg5

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