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CVE-2026-32237— @backstage/plugin-scaffolder-backend: Possible exposure of defaultEnvironment secrets using dry-run endpoint

Quick assessment

Affected
@backstage plugin-scaffolder-backend
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 3.1.5之前版本存在信息泄露漏洞，该漏洞源于具有执行脚手架试运行权限的已验证用户可通过试运行API响应访问服务器配置的环境密钥。

CVSS 4.4 · Medium EPSS 0.41% · P33
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I. Basic Information for CVE-2026-32237

Vulnerability Information
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Vulnerability Title
@backstage/plugin-scaffolder-backend: Possible exposure of defaultEnvironment secrets using dry-run endpoint
Source: CVE Program / CVE List V5
Vulnerability Description
Backstage is an open framework for building developer portals. Prior to 3.1.5, authenticated users with permission to execute scaffolder dry-runs can gain access to server-configured environment secrets through the dry-run API response. Secrets are properly redacted in log output but not in all parts of the response payload. Deployments that have configured scaffolder.defaultEnvironment.secrets are affected. This is patched in @backstage/plugin-scaffolder-backend version 3.1.5.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Backstage 信息泄露漏洞
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 3.1.5之前版本存在信息泄露漏洞，该漏洞源于具有执行脚手架试运行权限的已验证用户可通过试运行API响应访问服务器配置的环境密钥。
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-scaffolder-backend < 3.1.5 -

II. Public POCs for CVE-2026-32237

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III. Intelligence Information for CVE-2026-32237

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Patches & Fixes for CVE-2026-32237 (1)

Vendor Advisories for CVE-2026-32237 (1)

Same Patch Batch · @backstage · 2026-03-12 · 3 CVEs total

CVE-2026-32235 5.9 MEDIUM @backstage/plugin-auth-backend: OAuth redirect URI allowlist bypass
CVE-2026-32236 @backstage/plugin-auth-backend: SSRF in experimental CIMD metadata fetch

IV. Related Vulnerabilities

Same vendor: @backstage
Same weakness: CWE-200

V. Comments for CVE-2026-32237

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