SCA: security update for @backstage/plugin-auth-backend-module-oidc-provider (GHSA-826h-28h9-65hg)

high Tenable Cloud Security Plugin ID 473717

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 0.4.20, the @backstage/plugin-
auth-backend-module-oidc-provider package is affected by improper authentication in the oidc provider.
Deployments using OIDC email-based identity resolution with a provider that permits unverified email
addresses may allow an authenticated provider user to assume another catalog identity. This may grant
access and permissions associated with that user. No direct availability impact is demonstrated. This
issue is fixed in version 0.4.20. (CVE-2026-106488)

Solution

Update the @backstage/plugin-auth-backend-module-oidc-provider library and its related packages to version 0.4.20 or later.

Plugin Details

Severity: High

ID: 473717

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 10/7/2026

Updated: 10/7/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.48

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 6.3

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

CVSS Score Source: CVE-2026-106488

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/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: 10/6/2026

Reference Information

CVE: CVE-2026-106488

cwe: CWE-287

Detections

Analytics