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CVE-2026-106506: Backstage is an open framework for building developer portals

27
Routine
MEDIUM 5.3WATCHLISTUPGRADEUPGRADE

CVE-2026-106506 is a medium-severity flaw (CVSS 5.3) affecting backstage\/plugin-scaffolder-backend, backstage. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Backstage is an open framework for building developer portals. Prior to 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by improper input validation in scaffolder task list ordering. An authenticated Backstage user with permission to create and read relevant scaffolder tasks may be able to infer confidential task data under specific conditions. Successful exploitation requires retained task secrets, visibility of a target task

Why this priority

  • On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score5.3 (Medium)
Attack vectorNetwork (remote)
Attack complexityHigh
Privileges neededLow
User interactionNone
EPSS exploit chance0.2% (top 88%)
CISA exploited listNo
WeaknessCWE-202, CWE-203
Published2026-10-06
Last modified2026-10-09
Publisher (CNA): GitHub, Inc. · Vendor: linuxfoundation

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Last updated 2026-10-09 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

linuxfoundation backstage\/plugin-scaffolder-backend UPGRADE
Affected: < 4.1.0
Fixed in: 4.1.0
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy backstageplugin-scaffolder-backend || rpm -q backstageplugin-scaffolder-backend || backstageplugin-scaffolder-backend --version
2. UPGRADE to 4.1.0 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade backstageplugin-scaffolder-backend
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade backstageplugin-scaffolder-backend
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
linuxfoundation backstage UPGRADE
Affected: < 1.54.6
Fixed in: 1.54.6
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy backstage || rpm -q backstage || backstage --version
2. UPGRADE to 1.54.6 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade backstage
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade backstage
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-106506?

backstage\/plugin-scaffolder-backend: upgrade to 4.1.0; backstage: upgrade to 1.54.6. Exact commands for each OS are on this page.

Is CVE-2026-106506 being exploited?

CVE-2026-106506 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-106506 affect?

CVE-2026-106506 affects backstage\/plugin-scaffolder-backend, backstage. Severity is medium (CVSS 5.3). Backstage is an open framework for building developer portals. Prior to 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by improper input validation in scaffolder task list ordering. An authenticated Backstage user with

How urgent is CVE-2026-106506?

Priority 27/100. On your watchlist

Related CVEs

References

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