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Vulnerability record · CVE-2026-106501 · published 6 October 2026

CVE-2026-106501: Information exposure vulnerability

Backstage is an open framework for building developer portals. Prior to 3.3.1, 3.4.1, 4.0.3 and 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by sensitive information exposure in scaffolder. An authenticated Backstage user who can read another user's Scaffolder task may receive internal execution data. In deployments where that data contains credentials for an external service, this may permit disclosure and unauthorized changes in that external service. This issue is fixed in versions 3.3.1, 3.4.1, 4.0.3 and 4.1.0.

9.6 CVSS 3.1 Critical EPSS 0.47% · top 61.1% CWE-200 · Information exposureCWE-201 · CWE-201 Awaiting Analysis
9.6CVSS 3.1 base score
0.47%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
7References
7 Oct 2026Last modified by NVD

Description

Backstage is an open framework for building developer portals. Prior to 3.3.1, 3.4.1, 4.0.3 and 4.1.0, the @backstage/plugin-scaffolder-backend package is affected by sensitive information exposure in scaffolder. An authenticated Backstage user who can read another user's Scaffolder task may receive internal execution data. In deployments where that data contains credentials for an external service, this may permit disclosure and unauthorized changes in that external service. This issue is fixed in versions 3.3.1, 3.4.1, 4.0.3 and 4.1.0.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

References

LinkTags
https://github.com/backstage/backstage/commit/66d2219edf0abe33ab7d0c1ced5d069d1e065be5
https://github.com/backstage/backstage/commit/c19838870476a8e29144c84b1a5ac0654ec20fb5
https://github.com/backstage/backstage/commit/e262d649981ff99bb01ca7077807ae3e25e85560
https://github.com/backstage/backstage/releases/tag/v1.49.6
https://github.com/backstage/backstage/releases/tag/v1.50.5
https://github.com/backstage/backstage/releases/tag/v1.54.6
https://github.com/backstage/backstage/security/advisories/GHSA-g2v8-7jhw-pp8p

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Source: NIST National Vulnerability Database (record CVE-2026-106501), CISA KEV, FIRST EPSS (scores of 2026-10-07). This page is refreshed as NVD updates the record.