Answer in brief
CVE-2026-106495 records a Medium severity (CVSS 4.3) vulnerability in Backstage: Improper access control in backend action invocation. The current sources do not mark it as known exploited. The current feed maps @backstage/backend-defaults (generic), backstage/backstage (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 4.3. 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/backend-defaults (generic), backstage/backstage (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| @backstage/backend-defaultsgeneric | <0.17.8 | 0.17.8 |
| backstage/backstagegeneric | <1.54.6 | 1.54.6 |
Published upstream
Oct 12, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 12, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 12, 2026
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.
Quoted source text, attributed separately from HOL analysis.