CVE-2025-49596

CRITICALNVD 9.49.4—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.4 under NVD CVSS v3. EPSS exploit probability: 38.9%, top 2% 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, nvd
Elevated
9.4
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 39%CVSS: 9.4Exploit: NoneExposed: 0

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

The MCP inspector is a developer tool for testing and debugging MCP servers. Versions of MCP Inspector below 0.14.1 are vulnerable to remote code execution due to lack of authentication between the Inspector client and proxy, allowing unauthenticated requests to launch MCP commands over stdio. Users should immediately upgrade to version 0.14.1 or later to address these vulnerabilities.

CVSS v3
9.4
EG Score
9.4(medium)
EG Risk
58(Track)
EG Risk 58/100SSVC: Track

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
Severity94% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
98.4%
KEV
Not listed

Published

June 13, 2025

Last Modified

April 15, 2026

Advisory Details (4)

Auto-updated Jul 15, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: github_commit, github.
generic🔴 Active Exploitation

Critical RCE in Anthropic MCP Inspector (CVE-2025-49596) Enables Browser-Based Exploits

https://www.oligo.security/blog/critical-rce-vulnerability-in-anthropic-mcp-inspector-cve-2025-49596
generic

MCP Vulnerability Exposes the AI Untrusted Code Crisis - The New Stack

https://thenewstack.io/mcp-vulnerability-exposes-the-ai-untrusted-code-crisis
github Patch Available

Inspector proxy server vulnerabilities · Advisory · modelcontextprotocol/inspector · GitHub

https://github.com/modelcontextprotocol/inspector/security/advisories/GHSA-7f8r-222p-6f5g
github_commit Patch Available

commit 50df0e1ec488 (modelcontextprotocol/inspector)

Patch available: modelcontextprotocol/inspector 0.14.1 (contains commit 50df0e1ec488)

https://github.com/modelcontextprotocol/inspector/commit/50df0e1ec488f3983740b4d28d2a968f12eb8979

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
@modelcontextprotocol/inspector—0.14.1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 39× 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 112 total refreshes for this CVE.

  1. 2026-07-23 02:57 UTCEG score recompute
  2. 2026-07-22 14:07 UTCEPSS rescore
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  1. 2026-07-05 02:30 UTCEPSS rescore
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  8. 2026-06-26 05:16 UTCOSV refresh
  9. 2026-06-25 13:49 UTCEPSS rescore
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  34. 2026-06-08 16:06 UTCEG score recompute▲ 9.40
  35. 2026-06-08 14:16 UTCEPSS rescore
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  37. 2026-06-07 15:24 UTCEPSS rescore
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  44. 2026-06-04 13:12 UTCEPSS rescore
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  46. 2026-06-03 04:10 UTCOSV refresh
  47. 2026-06-02 20:12 UTCEPSS rescore
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  75. 2026-05-21 22:43 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Nucleihttp/cves/2025/CVE-2025-49596.yaml
    First seen Jan 1, 2025

    MCP Inspector < 0.14.0 UnauthenticatedRemote Code Execution

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2025-49596?
CVE-2025-49596 is a critical vulnerability published on June 13, 2025. The MCP inspector is a developer tool for testing and debugging MCP servers. Versions of MCP Inspector below 0.14.1 are vulnerable to remote code execution due to lack of authentication between the Inspector client and proxy, allowing unauthenticated requests to launch MCP commands over stdio.…
When was CVE-2025-49596 disclosed?
CVE-2025-49596 was first published in the National Vulnerability Database on June 13, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-49596 actively exploited?
CVE-2025-49596 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 98.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-49596?
CVE-2025-49596 has a CVSS v3 base score of 9.4 (NVD).
How do I remediate CVE-2025-49596?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-49596, 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

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