Answer in brief
CVE-2026-59148 records a High severity (CVSS 8.8) vulnerability in Mockoon: Unauthenticated admin API + wildcard CORS allows mock-state hijack and secret theft. The current sources do not mark it as known exploited. The current feed maps mockoon/mockoon (generic), @mockoon/cli (npm), @mockoon/cli (npm), @mockoon/commons-server (npm) and additional mapped packages. 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 8.8. 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 mockoon/mockoon (generic), @mockoon/cli (npm), @mockoon/cli (npm), @mockoon/commons-server (npm) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| mockoon/mockoongeneric | < 9.7.0 | Not reported |
| @mockoon/clinpm | <9.7.0 | 9.7.0 |
| @mockoon/clinpm | >=0 <9.7.0 | 9.7.0 |
| @mockoon/commons-servernpm | <9.7.0 | 9.7.0 |
| @mockoon/commons-servernpm | >=0 <9.7.0 | 9.7.0 |
Published upstream
Jul 9, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 10, 2026
Mockoon provides way to design and run mock APIs. Prior to 9.7.0, Mockoon's admin API in commons-server/src/libs/server/admin-api.ts is mounted on the same Express listener as user-defined mock routes, enabled by default in shipped runtimes, serves Access-Control-Allow-Origin: * with write methods allowed, and has no authentication. Any unauthenticated caller who can reach the mock server port can read MOCKOON_* environment variables, write arbitrary process environment variables through /mockoon-admin/env-vars, rewrite mock route bodies, statuses, and headers through PUT /mockoon-admin/environment, read transaction logs and SSE streams, and purge state. This issue is fixed in version 9.7.0.
Quoted source text, attributed separately from HOL analysis.