All vulnerabilities
CVE-2026-106494GHSA-7649-wm97-w3j3

@backstage/backend-defaults: Backstage: Improper input validation in cloud storage URL readers

backstage @backstage/backend-defaultsnpmLibraries & packages
Open in ThreatlineRecord JSON
CVSS
4.4Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.30%Chance of exploitation activity in the next 30 days, higher than 22% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in0.17.8Fixed versionGitHub
Published6 Oct 2026Updated 7 Oct 2026CVE List

What fixes it

  • 0.17.8@backstage/backend-defaults, npmGitHubnpm install @backstage/backend-defaults@0.17.8

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

Impact

An attacker with write access to a cloud storage bucket used by Backstage could craft object names that could collide with protected files in the output directory. In certain deployment configurations, this could lead to content injection.

Patches

Patched in @backstage/backend-defaults version 0.17.8

Text from GitHub Advisory Database

Affected versions 4

  • @backstage/backend-defaults, npm< 0.17.8GitHub
  • backstageaffected: < 1.54.6CVE List
  • backend-defaultsaffected: < 0.17.8CVE List
  • @backstage/backend-defaults, npmfrom first release, fixed in 0.17.8OSV

References 5