mcp-remote is exposed to OS command injection when connecting to untrusted MCP servers due to crafted input from the authorization_endpoint response URL
CVE-2025-6514
This critical-severity CVE scores 9.6 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 76.6%, top 1% 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).
- High exploitation likelihood — EPSS 78%
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 9.6
- EG Score
- 9.6(medium)
- EG Risk
- 74(Track)EG Risk 74/100SSVC: 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 computedSeverity96% × 45%Exploitation77% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 78%
- EPSS %ILE
- 100%
- KEV
- Not listed
Published
July 9, 2025
Last Modified
June 17, 2026
Advisory Details (3)
Auto-updated Sep 14, 2026OS command injection in mcp-remote when connecting to untrusted MCP servers | JFSA-2025-001290844 - JFrog Security Research
https://research.jfrog.com/vulnerabilities/mcp-remote-command-injection-rce-jfsa-2025-001290844/commit 607b226a356c (geelen/mcp-remote)
Patch available: geelen/mcp-remote v0.3.1 (contains commit 607b226a356c)
https://github.com/geelen/mcp-remote/commit/607b226a356cb61a239ffaba2fb3db1c9dea4bacCVE-2025-6514 Threatens LLM clients
https://jfrog.com/blog/2025-6514-critical-mcp-remote-rce-vulnerabilityAffected Packages
(1 across 1 ecosystem)
npm(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| mcp-remote | — | 0.1.16 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 5× in last 7d / 18× 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 124 total refreshes for this CVE.
- 2026-09-18 19:27 UTCEPSS rescore
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- 2026-08-12 09:54 UTCOSV refresh
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Publicly available exploits
(1 reference)Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.
- GitHub PoCCyberency/CVE-2025-6514First seen Oct 26, 2025
mcp-remote exposed to OS command injection
Open source ↗
Related CVEs(same CWE)
Same CWE
10 shownCWE-78
Frequently asked(5)
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Dependency Blast Radius
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