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CVE-2025-53109

Model Context Protocol Servers Vulnerable to Path Validation Bypass via Prefix Matching and Symlink Handling

HIGH
7.3
CVSS Score
Published: July 2, 2025 at 02:30 PM UTC
Updated: June 17, 2026 at 09:37 AM UTC
1 product affected across 1 vendorServers

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Severity
HIGH7.3
Exploit prediction
EPSS 0.8%
SSVC
No known exploit

Description

Model Context Protocol Servers is a collection of reference implementations for the model context protocol (MCP). Versions of Filesystem prior to 0.6.4 or 2025.7.01 could allow access to unintended files via symlinks within allowed directories. Users are advised to upgrade to 0.6.4 or 2025.7.01 resolve.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Servers· Modelcontextprotocol
60%
v < 0.6.4v < 2025.7.01
Affected range stops below 0.6.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 2025.7.01, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

x_refsource_MISC
Source: [email protected]
https://github.com/modelcontextprotocol/servers/commit/d00c60df9d74dba8a3bb13113f8904407cda594f
x_refsource_CONFIRM
Source: [email protected]
https://github.com/modelcontextprotocol/servers/security/advisories/GHSA-q66q-fx2p-7w4m

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.3HIGHGitHub_M
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-59

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