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

CVE-2026-32237 → View on GitHub ↗ View on CVE.org ↗ View on NVD ↗

Description

Impact

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.

### Patches

This is patched in @backstage/plugin-scaffolder-backend version 3.1.5
### Workarounds

Remove or empty the scaffolder.defaultEnvironment.secrets configuration from app-config.yaml. Alternatively, restrict access to the scaffolder dry-run functionality via the
permissions framework.

### References

Basic information

Type
reviewed
Severity
medium
Advisory on GitHub
Open advisory ↗
Repository advisory
Open repository advisory ↗
Source code
Browse source ↗
Published (advisory)
2026-03-12 14:51:06 UTC
Updated
2026-03-13 13:35:52 UTC
GitHub reviewed
2026-03-12 14:51:06 UTC
NVD published
2026-03-12 19:16:19 UTC

EPSS Score

Score Percentile
0.03% 9.11%

CVSS Scores

Base score Version Severity Vector
4.4 3.1 —
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/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:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
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:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.

Identifiers

Type Value
GHSA GHSA-8wq8-6859-qx77 ↗
CVE CVE-2026-32237 ↗

CWEs

CWE id Name
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

Affected packages (1)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
npm @backstage/plugin-scaffolder-backend >= 3.1.0, < 3.1.5 3.1.5 —

References

cvelogic Threat Intelligence