CVE-2026-44374 Backstage: Catalog unprocessed read endpoints allow authenticated cross-owner data access without permission checks
Authenticated users can access unprocessed entity records from other owners due to missing permission checks in the Backstage catalog plugin.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-44374?
CVE-2026-44374 is a medium-severity missing authorization vulnerability in @backstage plugin-catalog-backend-module-unprocessed, published on 14 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Backstage is an open framework for building developer portals. Prior to 0.6.11, the unprocessed entities read endpoints in @backstage/plugin-catalog-backend-module-unprocessed do not enforce permission authorization checks. Any authenticated user can access unprocessed entity records regardless of ownership. This is an information disclosure vulnerability affecting Backstage installations using this module. This is patched in @backstage/plugin-catalog-backend-module-unprocessed version 0.6.11, @backstage/plugin-catalog-unprocessed-entities-common version 0.0.15 and @backstage/plugin-catalog-unprocessed-entities version 0.2.30.
Weakness: CWE-863
Which versions are affected by CVE-2026-44374?
6 open source packages ship an affected version, including @backstage/plugin-catalog-backend-module-unprocessed, @backstage/plugin-catalog-unprocessed-entities and @backstage/plugin-catalog-unprocessed-entities-common. It affects 3 products.
| Package | Affected | Fixed in |
|---|---|---|
@backstage/plugin-catalog-backend-module-unprocessed npm | All versions | 0.6.11 |
@backstage/plugin-catalog-backend-module-unprocessed npm | All versions | 0.6.11 |
@backstage/plugin-catalog-unprocessed-entities npm | All versions | 0.2.30 |
@backstage/plugin-catalog-unprocessed-entities npm | All versions | 0.2.30 |
@backstage/plugin-catalog-unprocessed-entities-common npm | All versions | 0.0.15 |
@backstage/plugin-catalog-unprocessed-entities-common npm | All versions | 0.0.15 |
Products include Linuxfoundation Backstage\/Plugin-Catalog-Backend-Module-Unprocessed, Linuxfoundation Backstage\/Plugin-Catalog-Unprocessed-Entities, Linuxfoundation Backstage\/Plugin-Catalog-Unprocessed-Entities-Common.
How do I fix CVE-2026-44374?
Upgrade @backstage/plugin-catalog-backend-module-unprocessed to 0.6.11 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-44374 being exploited?
There is no known exploitation of CVE-2026-44374 in the wild and no public exploit code.
Sources
Also known as GHSA-p7g9-rp3g-mgfg.