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Advisory record · GHSA-pcmq-25r3-5w9v

Backstage: Inconsistent enforcement of allowed location types during catalog processing

CVSS 3.1 LowEPSS 0.0024 · 15th percentile

Published by the GitHub Advisory Database at 7 Oct 2026, 17:59 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
@backstage/plugin-catalog-backendnpm<3.9.13.9.1
Identifiers
GHSA-pcmq-25r3-5w9v · CVE-2026-106496
Weakness (CWE)
CWE-22 · CWE-863
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-catalog-backend npm package, versions before 3.9.1, is affected. Under certain configurations, the catalog backend could process location types that were not meant to be allowed, which could lead to unintended file access on the backend host. The source does not describe what level of access an attacker would need. Upgrade to version 3.9.1, the patched release; the source states no practical workarounds exist.

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
3.1 Low 3.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0024, the 15th 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.