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Vulnerability · Published May 14, 2026 · Assigned by GitHub_M

CVE-2026-44374Backstage: Catalog unprocessed read endpoints allow authenticated cross-owner data access without permission checks

Medium 4.3

In plain English

A medium-severity incorrect authorization in plugin-catalog-backend-module-unprocessed from @backstage. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.2%top 93.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
npm@backstage/plugin-catalog-backend-module-unprocessed0.6.11GHSA-p7g9-rp3g-mgfg
npm@backstage/plugin-catalog-unprocessed-entities0.2.30GHSA-p7g9-rp3g-mgfg
npm@backstage/plugin-catalog-unprocessed-entities-common0.0.15GHSA-p7g9-rp3g-mgfg

Affected products (as reported)

VendorProductVersions
@backstage plugin-catalog-backend-module-unprocessed < 0.6.11
@backstage plugin-catalog-unprocessed-entities < 0.2.30
@backstage plugin-catalog-unprocessed-entities-common < 0.0.15

Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References