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

Quick assessment

Affected
@backstage plugin-catalog-backend-module-unprocessed
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Backstage是Backstage开源的一个应用软件。后台是一个开放的平台，用于构建开发者门户。 Backstage 0.6.11之前版本存在安全漏洞，该漏洞源于@backstage/plugin-catalog-backend-module-unprocessed中未处理实体读取端点未强制执行权限授权检查，任何经过身份验证的用户均可访问未处理实体记录，导致信息泄露。

CVSS 4.3 · Medium EPSS 0.28% · P18

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 3

VendorProduct Version RangeStatus
@backstage plugin-catalog-backend-module-unprocessed < 0.6.11 affected
@backstage plugin-catalog-unprocessed-entities < 0.2.30 affected
@backstage plugin-catalog-unprocessed-entities-common < 0.0.15 affected
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I. Basic Information for CVE-2026-44374

Vulnerability Information
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Vulnerability Title
Backstage: Catalog unprocessed read endpoints allow authenticated cross-owner data access without permission checks
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Backstage 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Backstage是Backstage开源的一个应用软件。后台是一个开放的平台，用于构建开发者门户。 Backstage 0.6.11之前版本存在安全漏洞，该漏洞源于@backstage/plugin-catalog-backend-module-unprocessed中未处理实体读取端点未强制执行权限授权检查，任何经过身份验证的用户均可访问未处理实体记录，导致信息泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
@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 -

II. Public POCs for CVE-2026-44374

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III. Intelligence Information for CVE-2026-44374

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Vendor Advisories for CVE-2026-44374 (1)

IV. Related Vulnerabilities

Same vendor: @backstage
Same weakness: CWE-863

V. Comments for CVE-2026-44374

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