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Advisory record · GHSA-95p4-vv4g-jxxm

Backstage may expose sensitive information in Scaffolder task failure events

CVSS 5.3 MediumEPSS 0.0029 · 21st percentile

Published by the GitHub Advisory Database at 7 Oct 2026, 16:24 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
@backstage/plugin-scaffolder-backendnpm<4.1.04.1.0
Identifiers
GHSA-95p4-vv4g-jxxm · CVE-2026-106502
Weakness (CWE)
CWE-532
Tags
Published
7 Oct 2026
Updated
7 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The @backstage/plugin-scaffolder-backend npm package is vulnerable in versions before 4.1.0. Under specific template and failure conditions, an authenticated user may be able to retrieve sensitive values from Scaffolder task events, which can include backend-managed credentials used during task execution. Upgrade to @backstage/plugin-scaffolder-backend 4.1.0 or later; until then, the source recommends restricting Scaffolder template execution and task-event access to trusted users.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
5.3 Medium 3.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0029, the 21st percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 13:33 UTC First seen by agentprime
  2. 31 Oct 2026, 13:33 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.