CVE-2026-106506
Backstage: Improper input validation in scaffolder task list ordering
No known exploitation. EPSS puts it in the 11th percentile. Fixed versions are out.
What to do
Find your product and version, then upgrade to the build on the right.
- BackstageAffected: < 1.54.6Upgrade to: not statedStated by: CVE record
- @backstage Plugin-scaffolder-backendAffected: < 4.1.0Upgrade to: not statedStated by: CVE record
- Linuxfoundation Backstage\/plugin-scaffolder-backendAffected: < 4.1.0Upgrade to: 4.1.0Stated by: NVD
- Linuxfoundation BackstageAffected: < 1.54.6Upgrade to: 1.54.6Stated by: NVD
Versions as the sources state them. Full version matrix after sign-in
What it is
From the CVE record
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, knowledge of the secret structure, and repeated requests. This issue is fixed in version 4.1.0.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.2% chance of exploitation activity in the next 30 days, which ranks it in the 11th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
9 events over 3 days, from the signal feeds we watch.
- Patch availableworkaround available, record updated
- Record updatedrecord updated
- Publishedweakness classified, att&ck mapped, record updated
Affected products
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Scored 5.3 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity HighRequires specific conditions like a race condition or non-default configuration
- Privileges Required LowRequires basic user-level privileges
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity NoneNo integrity impact
- Availability NoneNo availability impact
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
Sources
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