Detections
Analytics

SCA: security update for @backstage/plugin-kubernetes-backend (GHSA-r9ph-3637-55px)

medium Tenable Cloud Security Plugin ID 473655

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Backstage is an open framework for building developer portals. Prior to 0.21.8, the @backstage/plugin-
 kubernetes-backend package is affected by improper entity validation in deprecated kubernetes services
 endpoint. An authenticated user with Kubernetes read permissions could access Kubernetes workload data
 beyond their intended scope by supplying crafted entity data to the deprecated services endpoint. The
 exposure is limited to read-only access to Kubernetes object metadata across configured clusters. This
 issue is fixed in version 0.21.8. (CVE-2026-106563)

Solution

Update the @backstage/plugin-kubernetes-backend library and its related packages to version 0.21.8 or later.

See Also

https://github.com/advisories/GHSA-r9ph-3637-55px

Plugin Details

Severity: Medium

ID: 473655

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 10/7/2026

Updated: 10/7/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.68

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 3.6

Vector: CVSS2#AV:N/AC:H/Au:S/C:C/I:N/A:N

CVSS Score Source: CVE-2026-106563

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 10/7/2026

Vulnerability Publication Date: 10/7/2026

Reference Information

CVE: CVE-2026-106563