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: 0.3% (16th percentile of EPSS-scored CVEs). 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
Elevated
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 8.8Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

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
8.8HIGHmedium confidence
EG Risk
56
EG Risk 56/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.3%
EPSS %ILE
16th
KEV
Not listed

CISA SSVCTrack at low, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

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
githubMentions a patch (unverified)🟡 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

Vendor Advisories for CVE-2026-59148(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(2 across 1 ecosystem)
npm(2)
PackageVulnerable rangeFix by version rangeDependents
@mockoon/cli—
  • every version up to 9.7.0: fixed in 9.7.0
—
@mockoon/commons-server—
  • every version up to 9.7.0: fixed in 9.7.0
—

Weakness Classification(4)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 32× 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.

Showing the most recent 100 of 137 total refreshes for this CVE.

  1. 2026-10-09 20:07 UTCEPSS rescore
  2. 2026-10-08 17:13 UTCEPSS rescore
  3. 2026-10-07 23:48 UTCEPSS rescore
  4. 2026-10-06 15:18 UTCEPSS rescore
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  10. 2026-10-01 16:01 UTCEG score recompute
  11. 2026-09-30 15:03 UTCEPSS rescore
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  14. 2026-09-28 10:27 UTCEG score recompute
  15. 2026-09-27 13:48 UTCEPSS rescore
  16. 2026-09-26 15:59 UTCEPSS rescore
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  18. 2026-09-24 11:24 UTCEG score recompute
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  21. 2026-09-20 20:16 UTCEPSS rescore
  22. 2026-09-18 19:28 UTCEPSS rescore
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  24. 2026-09-17 19:31 UTCEPSS rescore
  25. 2026-09-16 14:08 UTCEPSS rescore
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  1. 2026-09-16 05:15 UTCEPSS rescore
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  3. 2026-09-13 23:45 UTCEG score recompute
  4. 2026-09-13 16:47 UTCEPSS rescore
  5. 2026-09-13 08:18 UTCEG score recompute
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  7. 2026-09-11 14:53 UTCEPSS rescore
  8. 2026-09-10 09:35 UTCEPSS rescore
  9. 2026-09-08 22:01 UTCEPSS rescore
  10. 2026-09-07 16:01 UTCEPSS rescore
  11. 2026-09-06 13:59 UTCEG score recompute
  12. 2026-09-06 13:47 UTCEPSS rescore
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  14. 2026-09-04 05:07 UTCEPSS rescore
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  18. 2026-08-30 19:17 UTCEPSS rescore
  19. 2026-08-30 06:44 UTCEG score recompute
  20. 2026-08-30 01:22 UTCEPSS rescore
  21. 2026-08-28 21:42 UTCEPSS rescore
  22. 2026-08-27 21:44 UTCEG score recompute
  23. 2026-08-27 14:25 UTCEPSS rescore
  24. 2026-08-27 00:59 UTCEG score recompute
  25. 2026-08-26 14:46 UTCEPSS rescore
  26. 2026-08-26 03:49 UTCEG score recompute
  27. 2026-08-25 13:49 UTCEPSS rescore
  28. 2026-08-24 20:38 UTCEG score recompute
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  30. 2026-08-23 10:28 UTCEG score recompute
  31. 2026-08-23 00:19 UTCEPSS rescore
  32. 2026-08-22 01:11 UTCEG score recompute
  33. 2026-08-21 23:49 UTCEPSS rescore
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  35. 2026-08-20 22:55 UTCEPSS rescore
  36. 2026-08-20 01:46 UTCEG score recompute
  37. 2026-08-19 17:04 UTCEPSS rescore
  38. 2026-08-17 22:16 UTCEG score recompute
  39. 2026-08-17 13:47 UTCEPSS rescore
  40. 2026-08-16 19:36 UTCEG score recompute
  41. 2026-08-16 14:56 UTCEPSS rescore
  42. 2026-08-16 08:07 UTCEG score recompute
  43. 2026-08-16 02:14 UTCEPSS rescore
  44. 2026-08-15 10:01 UTCEG score recompute
  45. 2026-08-15 01:30 UTCEPSS rescore
  46. 2026-08-14 00:51 UTCEG score recompute
  47. 2026-08-13 22:00 UTCEPSS rescore
  48. 2026-08-12 15:41 UTCEG score recompute
  49. 2026-08-12 13:51 UTCEPSS rescore
  50. 2026-08-11 17:27 UTCEG score recompute
  51. 2026-08-11 06:18 UTCEG score recompute
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  53. 2026-08-09 21:08 UTCEG score recompute
  54. 2026-08-09 13:46 UTCEPSS rescore
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  56. 2026-08-08 16:37 UTCEPSS rescore
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  58. 2026-08-06 15:46 UTCEG score recompute
  59. 2026-08-06 13:47 UTCEPSS rescore
  60. 2026-08-06 04:42 UTCEG score recompute
  61. 2026-08-05 19:17 UTCEPSS rescore
  62. 2026-08-04 19:21 UTCEG score recompute
  63. 2026-08-04 15:10 UTCEPSS rescore
  64. 2026-08-04 10:39 UTCEPSS rescore
  65. 2026-08-03 19:56 UTCEG score recompute
  66. 2026-08-03 10:36 UTCEPSS rescore
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  68. 2026-08-02 02:27 UTCEPSS rescore
  69. 2026-08-01 12:38 UTCEG score recompute
  70. 2026-08-01 04:16 UTCEPSS rescore
  71. 2026-07-31 03:18 UTCEG score recompute
  72. 2026-07-30 16:28 UTCEPSS rescore
  73. 2026-07-30 16:13 UTCEG score recompute
  74. 2026-07-30 05:08 UTCEG score recompute
  75. 2026-07-30 01:30 UTCEPSS rescore

Related CVEs(same product + same CWE)

Same product

2 shown

npm:@mockoon/cli

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 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 0.3% probability of exploitation in the next 30 days (16th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-59148?
CVE-2026-59148 has a CVSS base score of 8.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-59148?
A fix for CVE-2026-59148 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-59148 are linked in the Vendor Advisories panel on this page.

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