CVE-2026-43901

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Source
https://cve.org/CVERecord?id=CVE-2026-43901
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43901.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-43901
Aliases
Downstream
Published
2026-05-11T21:51:41.387Z
Modified
2026-07-08T08:02:19.137165325Z
Severity
  • 6.8 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N CVSS Calculator
Summary
Wireshark MCP: Arbitrary file write via export_objects when WIRESHARK_MCP_ALLOWED_DIRS is not configured
Details

Wireshark MCP is an MCP Server that turns tshark into a structured analysis interface, then layers in optional Wireshark suite utilities. In 1.1.5 and earlier, wireshark-mcp exposes a wiresharkexportobjects MCP tool that accepts an attacker-controlled destdir parameter and passes it to tshark's --export-objects flag with no mandatory path restriction. The path sandbox (alloweddirs) is None by default and only activates when the environment variable WIRESHARKMCPALLOWEDDIRS is explicitly set. In a default installation, any directory on the filesystem can be used as the export destination.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43901.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-22"
    ]
}
References

Affected packages

Git / github.com/bx33661/wireshark-mcp

Affected ranges

Type
GIT
Repo
https://github.com/bx33661/wireshark-mcp
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
33fb5fd4efaa3cd3e92e5dfaab8c5112124e575d
Database specific 
{
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE"
    ],
    "cpe": "cpe:2.3:a:bx33661:wireshark_mcp:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "1.1.5"
        }
    ]
}

Affected versions

v0.*
v0.2.1
v0.4.0
v0.5.0
v0.6.0
v0.6.1
v0.6.2
v0.6.3
v0.6.4
v0.6.5
v1.*
v1.0.0
v1.1.0
v1.1.5
v1.2.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43901.json"