CVE-2026-57441

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Source
https://cve.org/CVERecord?id=CVE-2026-57441
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-57441.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-57441
Aliases
Published
2026-09-15T17:49:10Z
Modified
2026-10-28T02:31:02Z
Severity
  • 8.4 (High) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N CVSS Calculator
Summary
MCPVault: PathFilter restricted-directory deny-list bypass via case and trailing dot/space equivalence
Details

MCPVault is a lightweight Model Context Protocol server for safe access to files in an Obsidian vault. Prior to 0.11.4, PathFilter in src/pathfilter.ts compiles restricted-directory patterns case-sensitively and compares paths without canonicalizing filesystem-equivalent segment names. On case-insensitive macOS and Windows filesystems, case variants of .git, .obsidian, or node_modules pass both isAllowed() and isAllowedForListing() even though the operating system opens the restricted directory, and Windows trailing dots or spaces provide the same bypass. An attacker who influences a path selected by an AI agent can use the bypass in read, write, move, search, or listing operations to expose or modify sensitive repository and Obsidian metadata. Vault-root .. containment is not affected. This issue is fixed in version 0.11.4.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-178",
        "CWE-41"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/57xxx/CVE-2026-57441.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "range": [
                        {
                            "fixed": "0.11.4"
                        }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                }
            ]
        },
        {
            "extracted_events": [
                {
                    "range": [
                        {
                            "fixed": "0.11.4"
                        },
                        {
                            "fixed": "0.11.4"
                        }
                    ],
                    "source": "DESCRIPTION"
                }
            ]
        }
    ]
}
References

Affected packages

Git / github.com/bitbonsai/mcpvault

Affected ranges

Type
GIT
Repo
https://github.com/bitbonsai/mcpvault
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
0adb43901e1a08e85e14b42a8df2442fabc0b64a
Fixed
b9ea91a1c6d6adfec3e9e0483d9d79669e927fa8
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "fixed": "0adb43901e1a08e85e14b42a8df2442fabc0b64a"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "b9ea91a1c6d6adfec3e9e0483d9d79669e927fa8"
                }
            ],
            "source": "REFERENCES_COMMIT"
        }
    ]
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-57441.json"