Mockoon: Unauthenticated admin API + wildcard CORS allows mock-state hijack and secret theft

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Summary

CVECVE-2026-59148
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-09 19:17:07 UTC
Updated2026-07-09 20:16:30 UTC
DescriptionMockoon 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.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Problem Types: CWE-306 | CWE-352 | CWE-732 | CWE-942 | CWE-306 CWE-306: Missing Authentication for Critical Function | CWE-352 CWE-352: Cross-Site Request Forgery (CSRF) | CWE-732 CWE-732: Incorrect Permission Assignment for Critical Resource | CWE-942 CWE-942: Permissive Cross-domain Policy with Untrusted Domains

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1CNADECLARED8.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Mockoon Mockoon affected < 9.7.0 Not specified

References

ReferenceSourceLinkTags
github.com/mockoon/mockoon/releases/tag/v9.7.0 [email protected] github.com
github.com/mockoon/mockoon/security/advisories/GHSA-rqx4-3f6q-3x2v 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/mockoon/mockoon/pull/2254 [email protected] github.com
mockoon.com/releases/9.7.0 [email protected] mockoon.com
github.com/mockoon/mockoon/commit/c420b5a56918475b8663977b51e5f986e45b3299 [email protected] github.com
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