CVE-2026-43901

Name: CVE-2026-43901
Creator: NVD / NIST
Published: 2026-05-11T23:20:21.697+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.8/10EPSS 0.28%

Last modified Jun 17, 2026

CVE-2026-43901 is a medium-severity vulnerability rated 6.8/10 on the CVSS scale. 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. EPSS estimates a 0.28% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

6.8/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

EPSS Probability

0.28%

19.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions
Bx33661	Wireshark Mcp	<= 1.1.5

References

https://github.com/bx33661/Wireshark-MCP/security/advisories/GHSA-3r68-x3xc-rxpgExploit, Mitigation, Patch, Vendor Advisory
https://github.com/bx33661/Wireshark-MCP/security/advisories/GHSA-3r68-x3xc-rxpgExploit, Mitigation, Patch, Vendor Advisory

Timeline

Published: May 11, 2026
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2026-43901?

How severe is CVE-2026-43901?

CVE-2026-43901 has a CVSS score of 6.8/10 (MEDIUM severity). The EPSS model estimates a 0.28% probability of exploitation in the next 30 days.

How do I fix CVE-2026-43901?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-43901?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST