CVE-2026-59148

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 93% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this weekElevated
8.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
8.8
EG Score
8.8(medium)
EPSS
7.0%
KEV
Not listed

Published

July 9, 2026

Last Modified

July 10, 2026

Advisory Details (5)

Auto-updated Jul 9, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_pr, github_commit, github_release.
generic

Mockoon release v9.7.0

https://mockoon.com/releases/9.7.0
github_release Patch Available

Release v9.7.0 (mockoon/mockoon)

Patch available: mockoon/mockoon v9.7.0

https://github.com/mockoon/mockoon/releases/tag/v9.7.0
github_commit Patch Available

commit c420b5a56918 (mockoon/mockoon)

Patch available: mockoon/mockoon v9.7.0 (contains commit c420b5a56918)

https://github.com/mockoon/mockoon/commit/c420b5a56918475b8663977b51e5f986e45b3299
github_pr Patch Available

Admin API security hardening

Patch available: mockoon/mockoon v9.7.0 (PR #2254 merged 2026-06-18)

https://github.com/mockoon/mockoon/pull/2254
github Patch Available🟡 PoC Available

Unauthenticated admin API + wildcard CORS allows mock-state hijack and secret theft · Advisory · mockoon/mockoon · GitHub

https://github.com/mockoon/mockoon/security/advisories/GHSA-rqx4-3f6q-3x2v

Weakness Classification(4)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 8× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-11 14:48 UTCEG score recompute
  2. 2026-07-11 08:27 UTCEPSS rescore
  3. 2026-07-11 08:27 UTCEPSS rescore
  4. 2026-07-11 03:45 UTCEG score recompute
  5. 2026-07-10 16:42 UTCEG score recompute
  6. 2026-07-10 05:39 UTCEG score recompute
  7. 2026-07-09 18:35 UTCEG score recompute
  8. 2026-07-09 18:35 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-59148?
CVE-2026-59148 is a high vulnerability published on July 9, 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…
When was CVE-2026-59148 disclosed?
CVE-2026-59148 was first published in the National Vulnerability Database on July 9, 2026, with the most recent update on July 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-59148 actively exploited?
CVE-2026-59148 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 7.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-59148?
CVE-2026-59148 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-59148?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-59148, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-59148

Explore →

Is Your Infrastructure Affected by CVE-2026-59148?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs