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CVE-2026-59148

8.8 · HIGH

Mockoon provides way to design and run mock APIs.

Published Jul 9, 2026CWE-306EPSS 0.26%

Overview

CVE-2026-59148 is a high-severity vulnerability. It was published on July 9, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/mockoon/mockoon/commit/c420b5a56918475b8663977b51e5f986e45b3299GitHubgithub.com/mockoon/mockoon/pull/2254GitHubgithub.com/mockoon/mockoon/releases/tag/v9.7.0GitHubgithub.com/mockoon/mockoon/security/advisories/GHSA-rqx4-3f6q-3x2vRefmockoon.com/releases/9.7.0GitHubgithub.com/mockoon/mockoon/security/advisories/GHSA-rqx4-3f6q-3x2v

How CyberStrike helps

Frequently asked questions

What is CVE-2026-59148?

CVE-2026-59148 is a high-severity vulnerability. It was published on July 9, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-59148?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-59148?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-59148?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-59148 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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