CVE-2026-43901Public exploitNetwork attack vector

Arbitrary file write via unrestricted export destination

Published May 11, 2026 · Updated May 11, 2026

Path traversal in bx33661 Wireshark MCP 1.1.5 and earlier allows remote attackers to write files via a crafted packet capture. The wireshark_export_objects tool passes its dest_dir argument to tshark after _validate_output_path skips restriction when _allowed_dirs is None. Exploitation requires an AI client to process the crafted capture and invoke a write-capable tool while WIRESHARK_MCP_ALLOWED_DIRS is unset.

CVSS severity6.8
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Path traversal in bx33661 Wireshark MCP 1.1.5 and earlier allows remote attackers to write files via a crafted packet capture. The wireshark_export_objects tool passes its dest_dir argument to tshark after _validate_output_path skips restriction when _allowed_dirs is None. Exploitation requires an AI client to process the crafted capture and invoke a write-capable tool while WIRESHARK_MCP_ALLOWED_DIRS is unset.

The record

CVE
CVE-2026-43901
Published
May 11, 2026
Updated
May 11, 2026
Vendor
bx33661
Product
Wireshark MCP
Classifications
CWE-22, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 11, 2026CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=<= 1.1.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

bx33661 · Wireshark MCPversion=<= 1.1.5

Published CVSS scores

6.8GitHubCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1204.002Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo