CVE-2026-106495CWE-284broken-access-control

CVE-2026-106495

Medium · published October 13, 2026

CVSS v3.1
4.3
EPSS
0%
Percentile
14.0
In the wild
Unconfirmed
What it is

Backstage is an open framework for building developer portals. Prior to 0.17.8, the @backstage/backend-defaults package is affected by improper access control in backend action invocation. An authenticated user could invoke actions that an operator had excluded through action configuration. Existing action permissions and downstream authorization remain enforced. This issue is fixed in version 0.17.8.

The record
Technical detail
CVSS v3.1
4.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00238 · 14.0th percentile
Weakness
CWE-284 · Improper Access Control
Published
2026-10-13T01:17Z
References (3)
https://github.com/backstage/backstage/commit/a8fb34a990a69bcb745e85a3213cf9e5ba2d31a3 · [email protected]https://github.com/backstage/backstage/releases/tag/v1.54.6 · [email protected]https://github.com/backstage/backstage/security/advisories/GHSA-3xr5-8w6c-p5gw · [email protected]
EPSS history
Timeline
  • 14 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 12 OCT 20:11Z
    Backstage: Improper access control in backend action invocation
    cvelistv5
  • 12 OCT 20:11Z
    Backstage: Improper access control in backend action invocation
    cvelistv5