GHSA-mfvq-x7vr-rgqg

Backstage: Secret-derived values may be exposed in scaffolder task logs

At a glance

Published
Updated
CVE
CVE-2026-106499
CVSS_V3
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

Description

### Impact Deployments that configure sensitive `scaffolder.defaultEnvironment.secrets` and allow an attacker to create or modify Scaffolder templates are affected. A template author could cause secret-derived values used during template iteration to be persisted in task logs, exposing those values to users with access to the resulting task logs. ### Patches Patched in `@backstage/plugin-scaffolder-backend` version `4.1.0` ### Workarounds - Restrict permission to create or update Template entities to fully trusted parties, as recommended by the Backstage threat model. - If that restriction cannot be guaranteed, remove sensitive values from `scaffolder.defaultEnvironment.secrets` until a patched version is available. No complete workaround is known that preserves both untrusted template authoring and access to sensitive default-environment secrets.

Affected packages

PackageVersions
npm · @backstage/plugin-scaffolder-backendintroduced 0, fixed 4.1.0

References

Sources

SourceLicence
OSV.devCC-BY 4.0 — GitHub Advisory Database