Answer in brief
CVE-2026-106488 records a High severity (CVSS 8.1) vulnerability in Backstage: Improper authentication in the OIDC provider. The current sources do not mark it as known exploited. The current feed maps backstage/backstage (generic), @backstage/plugin-auth-backend-module-oidc-provider (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps backstage/backstage (generic), @backstage/plugin-auth-backend-module-oidc-provider (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| backstage/backstagegeneric | <1.54.6 | 1.54.6 |
| @backstage/plugin-auth-backend-module-oidc-providergeneric | <0.4.20 | 0.4.20 |
Published upstream
Oct 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 6, 2026
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.
Quoted source text, attributed separately from HOL analysis.