CVE-2026-106462CWE-441CWE-863broken-access-control

CVE-2026-106462

Medium · published October 7, 2026

CVSS v3.1
6.4
EPSS
0%
Percentile
6.2
In the wild
Unconfirmed
What it is

Backstage is an open framework for building developer portals. Prior to 1.54.6, scaffolder source-control actions may not consistently enforce intended credential boundaries. An authenticated user could cause an affected action to fall back to broader integration credentials and perform operations with more access than intended. This issue is fixed in 1.54.6 when operators also enable scaffolder.requireScmUserCredentials after upgrading.

The record
Technical detail
CVSS v3.1
6.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00171 · 6.2th percentile
Weaknesses
CWE-441 · Unintended Proxy or Intermediary ('Confused Deputy'); CWE-863 · Incorrect Authorization
Published
2026-10-07T01:17Z
Affected products (7)
ProductVersionsFixed in
linuxfoundation/backstage\/plugin-scaffolder-backend< 0.11.100.11.10
linuxfoundation/backstage\/plugin-scaffolder-backend-module-azure< 0.2.250.2.25
linuxfoundation/backstage\/plugin-scaffolder-backend-module-bitbucket-cloud< 0.3.100.3.10
linuxfoundation/backstage\/plugin-scaffolder-backend-module-bitbucket-server< 0.2.250.2.25
linuxfoundation/backstage\/plugin-scaffolder-backend-module-github< 0.9.130.9.13
linuxfoundation/backstage\/plugin-scaffolder-backend-module-gitlab< 0.11.100.11.10
linuxfoundation/backstage< 1.54.61.54.6
References (3)
https://github.com/backstage/backstage/commit/6fb2a41ea47da37eafe5ea744050ef90be6820c0 · [email protected]https://github.com/backstage/backstage/releases/tag/v1.54.6 · [email protected]https://github.com/backstage/backstage/security/advisories/GHSA-29gx-h2m3-xw44 · [email protected]
EPSS history
Timeline
  • 08 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 06 OCT 20:30Z
    Backstage: Scaffolder credential handling may allow unintended GitHub authentication fallback
    cvelistv5