---
id: CVE-2026-55543
title: 'TuxGuitar: Arbitrary Code Execution via maliciously crafted `.tg` file'
summary: >-
  TuxGuitar is an open-source guitar tablature editor. Prior to 2.1.0, an
  untrusted .tg file can set gervil.soundbank.path to reference an on-disk
  archive, including the .tg file itself, whose
  META-INF/services/javax.sound.midi.Soundbank e…
severity: high
cvss: 8.5
cvssVector: 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-94
  - CWE-470
vendor: helge17
product: tuxguitar
affected:
  - tuxguitar < 2.1.0
published: '2026-10-16'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T15:28:14.201Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-55543'
references:
  - url: >-
      https://github.com/helge17/tuxguitar/security/advisories/GHSA-v66p-c82h-w3cq
    label: >-
      https://github.com/helge17/tuxguitar/security/advisories/GHSA-v66p-c82h-w3cq
  - url: >-
      https://github.com/helge17/tuxguitar/commit/a7eef20e2e02ee454597d42c295327d9f098c636
    label: >-
      https://github.com/helge17/tuxguitar/commit/a7eef20e2e02ee454597d42c295327d9f098c636
  - url: 'https://github.com/helge17/tuxguitar/releases/tag/2.1.0'
    label: 'https://github.com/helge17/tuxguitar/releases/tag/2.1.0'
tags:
  - cve.org
ingestedAt: '2026-10-16T17:24:46.709Z'
---

## Overview

TuxGuitar is an open-source guitar tablature editor. Prior to 2.1.0, an untrusted .tg file can set gervil.soundbank.path to reference an on-disk archive, including the .tg file itself, whose META-INF/services/javax.sound.midi.Soundbank entry names an attacker-supplied class stored in that archive. When a user opens the file, JARSoundbankReader uses an unverified class loader to load and instantiate that class, executing its constructor with the privileges of the TuxGuitar process. This issue is fixed in version 2.1.0.

## Affected

- `tuxguitar < 2.1.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.