Medium 5.3Published Oct 6, 2026

CVE-2026-106502Backstage: Sensitive information may be exposed in Scaffolder task failure events

Updated under an hour ago (2026-10-19 08:30 UTC)

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It affects backstage and 3 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

Backstage is an open framework for building developer portals. Prior to 4.1.0, the @backstage/plugin-scaffolder-backend package could expose sensitive information in Scaffolder task failure events. Under specific template and failure conditions, an authenticated user may retrieve backend-managed credentials used during task execution from affected task events. This issue is fixed in version 4.1.0.

CVSS: 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-532
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Oct 7, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

backstage backstage backstage:backstage (from the name)	before 1.54.6	CNA record
@backstage plugin-scaffolder-backend backstage:plugin_scaffolder_backend (from the name)	before 4.1.0	CNA record
linuxfoundation backstage/plugin-scaffolder-backend linuxfoundation:backstage/plugin-scaffolder-backend	before 4.1.0	NVD
linuxfoundation backstage linuxfoundation:backstage	before 1.54.6	NVD

References

https://github.com/backstage/backstage/security/advisories/GHSA-95p4-vv4g-jxxmx-refsource-confirm, mitigation, vendor-advisory
https://github.com/backstage/backstage/commit/3f1e869708f002fb9838624b7379deb251691b47x-refsource-misc, patch
https://github.com/backstage/backstage/releases/tag/v1.54.6x-refsource-misc, patch, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.