CVE-2026-59149

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (39th 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
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 6.5Exploit: 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, a FILE response whose filePath embeds request data is confined by getSafeFilePath in packages/commons-server/src/libs/server/server.ts with resolvedPath.startsWith(staticBaseDir). That prefix test has no path-separator boundary, so a ../-escaped path whose absolute form string-prefixes the base directory passes, allowing an unauthenticated client to read files from sibling paths outside the served directory through HTTP sendFile, WebSocket, or callbacks. This issue is fixed in version 9.7.0.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
45
EG Risk 45/100CISA 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
Severity65% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
39th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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_commit, github_pr, github_release, github.
githubMentions a patch (unverified)🟡 PoC Available

Path traversal in templated `filePath` lets a request escape the served directory (prefix-only base check) · Advisory · mockoon/mockoon · GitHub

https://github.com/mockoon/mockoon/security/advisories/GHSA-8wqc-v2q8-vff2
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_pr Patch Available

Fix path traversal in file path

Patch available: mockoon/mockoon v9.7.0 (PR #2255 merged 2026-06-18)

https://github.com/mockoon/mockoon/pull/2255
github_commit Patch Available

commit b42bdfb7f82e (mockoon/mockoon)

Patch available: mockoon/mockoon v9.7.0 (contains commit b42bdfb7f82e)

https://github.com/mockoon/mockoon/commit/b42bdfb7f82e83f0e81bea8e6fe41adf5ec82585

Vendor Advisories for CVE-2026-59149(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(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 33× 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 135 total refreshes for this CVE.

  1. 2026-10-10 20:00 UTCEPSS rescore
  2. 2026-10-09 20:07 UTCEPSS rescore
  3. 2026-10-08 17:13 UTCEPSS rescore
  4. 2026-10-07 23:48 UTCEPSS rescore
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  11. 2026-10-01 16:01 UTCEG score recompute
  12. 2026-09-30 15:03 UTCEPSS rescore
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  15. 2026-09-28 10:27 UTCEG score recompute
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  24. 2026-09-18 05:35 UTCEG score recompute
  25. 2026-09-17 19:31 UTCEPSS rescore
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  1. 2026-09-16 14:08 UTCEPSS rescore
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  4. 2026-09-14 09:19 UTCEG score recompute
  5. 2026-09-13 16:47 UTCEPSS rescore
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  8. 2026-09-11 14:53 UTCEPSS rescore
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  26. 2026-08-25 13:49 UTCEPSS rescore
  27. 2026-08-24 20:20 UTCEG score recompute
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  29. 2026-08-23 00:19 UTCEPSS rescore
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  31. 2026-08-21 23:49 UTCEPSS rescore
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  35. 2026-08-19 17:04 UTCEPSS rescore
  36. 2026-08-19 12:40 UTCEG score recompute
  37. 2026-08-18 13:48 UTCEPSS rescore
  38. 2026-08-18 11:39 UTCEG score recompute
  39. 2026-08-17 13:47 UTCEPSS rescore
  40. 2026-08-17 10:37 UTCEG score recompute
  41. 2026-08-16 14:56 UTCEPSS rescore
  42. 2026-08-16 09:35 UTCEG score recompute
  43. 2026-08-16 02:14 UTCEPSS rescore
  44. 2026-08-15 08:34 UTCEG score recompute
  45. 2026-08-15 01:30 UTCEPSS rescore
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  47. 2026-08-13 22:00 UTCEPSS rescore
  48. 2026-08-13 06:30 UTCEG score recompute
  49. 2026-08-12 13:51 UTCEPSS rescore
  50. 2026-08-12 05:28 UTCEG score recompute
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  59. 2026-08-06 13:47 UTCEPSS rescore
  60. 2026-08-05 23:20 UTCEG score recompute
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  71. 2026-07-30 17:12 UTCEG score recompute
  72. 2026-07-30 16:28 UTCEPSS rescore
  73. 2026-07-30 01:30 UTCEPSS rescore
  74. 2026-07-30 01:30 UTCEPSS rescore
  75. 2026-07-29 15:26 UTCEG score recompute

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Same product

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npm:@mockoon/cli

Frequently asked(5)

What is CVE-2026-59149?
CVE-2026-59149 is a medium vulnerability published on July 9, 2026. Mockoon provides way to design and run mock APIs. Prior to 9.7.0, a FILE response whose filePath embeds request data is confined by getSafeFilePath in packages/commons-server/src/libs/server/server.ts with resolvedPath.startsWith(staticBaseDir). That prefix test has no path-separator boundary, so a…
When was CVE-2026-59149 disclosed?
CVE-2026-59149 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-2026-59149 actively exploited?
CVE-2026-59149 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (39th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-59149?
CVE-2026-59149 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-59149?
A fix for CVE-2026-59149 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-59149 are linked in the Vendor Advisories panel on this page.

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