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Advisory record · GHSA-75qf-886x-5xf2

Backstage: Improper input validation in Confluence to Markdown scaffolder module

CVSS 6.3 MediumEPSS 0.0033 · 26th percentile

Published by the GitHub Advisory Database at 7 Oct 2026, 18:03 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
@backstage/plugin-scaffolder-backend-module-confluence-to-markdownnpm<0.3.250.3.25
Identifiers
GHSA-75qf-886x-5xf2 · CVE-2026-106559
Weakness (CWE)
CWE-22 · CWE-73
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 scaffolder module @backstage/plugin-scaffolder-backend-module-confluence-to-markdown is vulnerable in versions before 0.3.25 due to insufficient input validation. An attacker who can influence Confluence content could affect file write operations during template execution, but exploitation requires a Backstage user to run a template that processes that content. Upgrade to version 0.3.25, which contains the fix; until then, restrict Confluence edit access to trusted users and review page content before running templates against untrusted pages.

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
6.3 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:L CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0033, the 26th percentile, on 9 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.