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

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.

Published: 2026-05-14 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-44374 is rated Low Risk (19.5/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.17%). Low composite risk—no urgent action required; patch on your normal maintenance cycle and revisit priority if CVSS or EPSS increases.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-44374

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.03% 0.17% +0.14%
2 2026-05-15 — 0.03% —

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-44374

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.8 1.4 [email protected]

Weakness enumeration for CVE-2026-44374

GitHub Security Advisory for CVE-2026-44374

GHSA-p7g9-rp3g-mgfg · Severity: medium · Ecosystem: npm — Backstage: Catalog unprocessed read endpoints allow authenticated cross-owner data access without permission checks

Affected software / configurations for CVE-2026-44374

Vendor Product Version Raw CPE
linuxfoundation backstage\/plugin-catalog-backend-module-unprocessed < 0.6.11 cpe:2.3:a:linuxfoundation:backstage\/plugin-catalog-backend-module-unprocessed:*:*:*:*:*:node.js:*:*
linuxfoundation backstage\/plugin-catalog-unprocessed-entities < 0.2.30 cpe:2.3:a:linuxfoundation:backstage\/plugin-catalog-unprocessed-entities:*:*:*:*:*:node.js:*:*
linuxfoundation backstage\/plugin-catalog-unprocessed-entities-common < 0.0.15 cpe:2.3:a:linuxfoundation:backstage\/plugin-catalog-unprocessed-entities-common:*:*:*:*:*:node.js:*:*

References for CVE-2026-44374

cvelogic Threat Intelligence