UBUNTU-CVE-2026-43901 (CVE-2026-43901)
Vulnerability from osv_ubuntu – Published: 2026-05-11 23:20 – Updated: 2026-05-20 15:28 – Source website
VLAI
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 wireshark_export_objects MCP tool that accepts an attacker-controlled dest_dir parameter and passes it to tshark's --export-objects flag with no mandatory path restriction. The path sandbox (_allowed_dirs) is None by default and only activates when the environment variable WIRESHARK_MCP_ALLOWED_DIRS is explicitly set. In a default installation, any directory on the filesystem can be used as the export destination.
Severity
6.8 (Medium)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libwireshark-data",
"binary_version": "2.6.10-1~ubuntu14.04.0~esm3"
},
{
"binary_name": "libwireshark11",
"binary_version": "2.6.10-1~ubuntu14.04.0~esm3"
},
{
"binary_name": "libwiretap8",
"binary_version": "2.6.10-1~ubuntu14.04.0~esm3"
},
{
"binary_name": "libwscodecs2",
"binary_version": "2.6.10-1~ubuntu14.04.0~esm3"
},
{
"binary_name": "libwsutil9",
"binary_version": "2.6.10-1~ubuntu14.04.0~esm3"
},
{
"binary_name": "tshark",
"binary_version": "2.6.10-1~ubuntu14.04.0~esm3"
},
{
"binary_name": "wireshark",
"binary_version": "2.6.10-1~ubuntu14.04.0~esm3"
},
{
"binary_name": "wireshark-common",
"binary_version": "2.6.10-1~ubuntu14.04.0~esm3"
},
{
"binary_name": "wireshark-gtk",
"binary_version": "2.6.10-1~ubuntu14.04.0~esm3"
},
{
"binary_name": "wireshark-qt",
"binary_version": "2.6.10-1~ubuntu14.04.0~esm3"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"name": "wireshark",
"purl": "pkg:deb/ubuntu/wireshark@2.6.10-1~ubuntu14.04.0~esm3?arch=source\u0026distro=esm-infra-legacy/trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.10.2-1",
"1.10.3-1",
"1.10.5-1ubuntu1",
"1.10.5-2",
"1.10.6-1",
"1.12.1+g01b65bf-4+deb8u11ubuntu0.14.04.1",
"2.6.3-1~ubuntu14.04.1",
"2.6.4-2~ubuntu14.04.1",
"2.6.5-1~ubuntu14.04.1",
"2.6.6-1~ubuntu14.04.0",
"2.6.8-1~ubuntu14.04.0~esm1",
"2.6.10-1~ubuntu14.04.0~esm1",
"2.6.10-1~ubuntu14.04.0~esm2",
"2.6.10-1~ubuntu14.04.0~esm3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libwireshark-data",
"binary_version": "2.6.10-1~ubuntu16.04.0+esm2"
},
{
"binary_name": "libwireshark11",
"binary_version": "2.6.10-1~ubuntu16.04.0+esm2"
},
{
"binary_name": "libwiretap8",
"binary_version": "2.6.10-1~ubuntu16.04.0+esm2"
},
{
"binary_name": "libwscodecs2",
"binary_version": "2.6.10-1~ubuntu16.04.0+esm2"
},
{
"binary_name": "libwsutil9",
"binary_version": "2.6.10-1~ubuntu16.04.0+esm2"
},
{
"binary_name": "tshark",
"binary_version": "2.6.10-1~ubuntu16.04.0+esm2"
},
{
"binary_name": "wireshark",
"binary_version": "2.6.10-1~ubuntu16.04.0+esm2"
},
{
"binary_name": "wireshark-common",
"binary_version": "2.6.10-1~ubuntu16.04.0+esm2"
},
{
"binary_name": "wireshark-gtk",
"binary_version": "2.6.10-1~ubuntu16.04.0+esm2"
},
{
"binary_name": "wireshark-qt",
"binary_version": "2.6.10-1~ubuntu16.04.0+esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "wireshark",
"purl": "pkg:deb/ubuntu/wireshark@2.6.10-1~ubuntu16.04.0+esm2?arch=source\u0026distro=esm-apps/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.12.7+g7fc8978-1",
"1.12.8+g5b6e543-2",
"2.0.1+g59ea380-3build1",
"2.0.2+ga16e22e-1",
"2.2.6+g32dac6a-2ubuntu0.16.04",
"2.6.3-1~ubuntu16.04.1",
"2.6.4-2~ubuntu16.04.0",
"2.6.5-1~ubuntu16.04.0",
"2.6.6-1~ubuntu16.04.0",
"2.6.8-1~ubuntu16.04.0",
"2.6.10-1~ubuntu16.04.0",
"2.6.10-1~ubuntu16.04.0+esm1",
"2.6.10-1~ubuntu16.04.0+esm2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libwireshark-data",
"binary_version": "2.6.10-1~ubuntu18.04.0+esm2"
},
{
"binary_name": "libwireshark11",
"binary_version": "2.6.10-1~ubuntu18.04.0+esm2"
},
{
"binary_name": "libwiretap8",
"binary_version": "2.6.10-1~ubuntu18.04.0+esm2"
},
{
"binary_name": "libwscodecs2",
"binary_version": "2.6.10-1~ubuntu18.04.0+esm2"
},
{
"binary_name": "libwsutil9",
"binary_version": "2.6.10-1~ubuntu18.04.0+esm2"
},
{
"binary_name": "tshark",
"binary_version": "2.6.10-1~ubuntu18.04.0+esm2"
},
{
"binary_name": "wireshark",
"binary_version": "2.6.10-1~ubuntu18.04.0+esm2"
},
{
"binary_name": "wireshark-common",
"binary_version": "2.6.10-1~ubuntu18.04.0+esm2"
},
{
"binary_name": "wireshark-gtk",
"binary_version": "2.6.10-1~ubuntu18.04.0+esm2"
},
{
"binary_name": "wireshark-qt",
"binary_version": "2.6.10-1~ubuntu18.04.0+esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "wireshark",
"purl": "pkg:deb/ubuntu/wireshark@2.6.10-1~ubuntu18.04.0+esm2?arch=source\u0026distro=esm-apps/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.4.2-1",
"2.4.3-1",
"2.4.4-1",
"2.4.5-1",
"2.6.3-1~ubuntu18.04.1",
"2.6.4-2~ubuntu18.04.0",
"2.6.5-1~ubuntu18.04.0",
"2.6.6-1~ubuntu18.04.0",
"2.6.8-1~ubuntu18.04.0",
"2.6.10-1~ubuntu18.04.0",
"2.6.10-1~ubuntu18.04.0+esm1",
"2.6.10-1~ubuntu18.04.0+esm2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libwireshark-data",
"binary_version": "3.2.3-1ubuntu0.1~esm2"
},
{
"binary_name": "libwireshark13",
"binary_version": "3.2.3-1ubuntu0.1~esm2"
},
{
"binary_name": "libwiretap10",
"binary_version": "3.2.3-1ubuntu0.1~esm2"
},
{
"binary_name": "libwsutil11",
"binary_version": "3.2.3-1ubuntu0.1~esm2"
},
{
"binary_name": "tshark",
"binary_version": "3.2.3-1ubuntu0.1~esm2"
},
{
"binary_name": "wireshark",
"binary_version": "3.2.3-1ubuntu0.1~esm2"
},
{
"binary_name": "wireshark-common",
"binary_version": "3.2.3-1ubuntu0.1~esm2"
},
{
"binary_name": "wireshark-gtk",
"binary_version": "3.2.3-1ubuntu0.1~esm2"
},
{
"binary_name": "wireshark-qt",
"binary_version": "3.2.3-1ubuntu0.1~esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "wireshark",
"purl": "pkg:deb/ubuntu/wireshark@3.2.3-1ubuntu0.1~esm2?arch=source\u0026distro=esm-apps/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.0.5-1",
"3.0.7-1",
"3.2.1-1",
"3.2.2-1",
"3.2.3-1",
"3.2.3-1ubuntu0.1~esm1",
"3.2.3-1ubuntu0.1~esm2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libwireshark-data",
"binary_version": "3.6.2-2ubuntu0.1~esm1"
},
{
"binary_name": "libwireshark15",
"binary_version": "3.6.2-2ubuntu0.1~esm1"
},
{
"binary_name": "libwiretap12",
"binary_version": "3.6.2-2ubuntu0.1~esm1"
},
{
"binary_name": "libwsutil13",
"binary_version": "3.6.2-2ubuntu0.1~esm1"
},
{
"binary_name": "tshark",
"binary_version": "3.6.2-2ubuntu0.1~esm1"
},
{
"binary_name": "wireshark",
"binary_version": "3.6.2-2ubuntu0.1~esm1"
},
{
"binary_name": "wireshark-common",
"binary_version": "3.6.2-2ubuntu0.1~esm1"
},
{
"binary_name": "wireshark-gtk",
"binary_version": "3.6.2-2ubuntu0.1~esm1"
},
{
"binary_name": "wireshark-qt",
"binary_version": "3.6.2-2ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:22.04:LTS",
"name": "wireshark",
"purl": "pkg:deb/ubuntu/wireshark@3.6.2-2ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.4.7-1~exp1",
"3.4.9-1",
"3.6.2-1ubuntu1",
"3.6.2-2",
"3.6.2-2ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libwireshark-data",
"binary_version": "4.2.2-1.1build3"
},
{
"binary_name": "libwireshark17t64",
"binary_version": "4.2.2-1.1build3"
},
{
"binary_name": "libwiretap14t64",
"binary_version": "4.2.2-1.1build3"
},
{
"binary_name": "libwsutil15t64",
"binary_version": "4.2.2-1.1build3"
},
{
"binary_name": "tshark",
"binary_version": "4.2.2-1.1build3"
},
{
"binary_name": "wireshark",
"binary_version": "4.2.2-1.1build3"
},
{
"binary_name": "wireshark-common",
"binary_version": "4.2.2-1.1build3"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "wireshark",
"purl": "pkg:deb/ubuntu/wireshark@4.2.2-1.1build3?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.0.8-1",
"4.0.10-1",
"4.0.11-1",
"4.2.0-1",
"4.2.2-1",
"4.2.2-1.1build1",
"4.2.2-1.1build2",
"4.2.2-1.1build3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libwireshark-data",
"binary_version": "4.4.7-1"
},
{
"binary_name": "libwireshark18",
"binary_version": "4.4.7-1"
},
{
"binary_name": "libwiretap15",
"binary_version": "4.4.7-1"
},
{
"binary_name": "libwsutil16",
"binary_version": "4.4.7-1"
},
{
"binary_name": "tshark",
"binary_version": "4.4.7-1"
},
{
"binary_name": "wireshark",
"binary_version": "4.4.7-1"
},
{
"binary_name": "wireshark-common",
"binary_version": "4.4.7-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "wireshark",
"purl": "pkg:deb/ubuntu/wireshark@4.4.7-1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.4.5-1",
"4.4.6-2",
"4.4.6-2build1",
"4.4.7-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libwireshark-data",
"binary_version": "4.6.4-1"
},
{
"binary_name": "libwireshark19",
"binary_version": "4.6.4-1"
},
{
"binary_name": "libwiretap16",
"binary_version": "4.6.4-1"
},
{
"binary_name": "libwsutil17",
"binary_version": "4.6.4-1"
},
{
"binary_name": "stratoshark",
"binary_version": "0.9.4-1"
},
{
"binary_name": "tshark",
"binary_version": "4.6.4-1"
},
{
"binary_name": "wireshark",
"binary_version": "4.6.4-1"
},
{
"binary_name": "wireshark-common",
"binary_version": "4.6.4-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "wireshark",
"purl": "pkg:deb/ubuntu/wireshark@4.6.4-1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.4.7-1",
"4.6.0-1",
"4.6.1-2",
"4.6.2-3",
"4.6.3-1",
"4.6.4-1"
]
}
],
"aliases": [],
"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 wireshark_export_objects MCP tool that accepts an attacker-controlled dest_dir parameter and passes it to tshark\u0027s --export-objects flag with no mandatory path restriction. The path sandbox (_allowed_dirs) is None by default and only activates when the environment variable WIRESHARK_MCP_ALLOWED_DIRS is explicitly set. In a default installation, any directory on the filesystem can be used as the export destination.",
"id": "UBUNTU-CVE-2026-43901",
"modified": "2026-05-20T15:28:57Z",
"published": "2026-05-11T23:20:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-43901"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-43901"
},
{
"type": "REPORT",
"url": "https://github.com/bx33661/Wireshark-MCP/security/advisories/GHSA-3r68-x3xc-rxpg"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-43901"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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