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CVE-2026-55543— TuxGuitar: Arbitrary Code Execution via maliciously crafted `.tg` file

Quick assessment

Affected
helge17 tuxguitar
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

TuxGuitar 是一款开源的吉他六线谱编辑器。在 2.1.0 版本之前，不受信任的 文件可将 配置为指向磁盘上的归档文件（包括该 文件本身），而该归档中的 条目可指定由攻击者提供的类。当用户打开该文件时， 会使用未经验证的类加载器加载并实例化该类，从而以 TuxGuitar 进程的权限执行其构造函数。此问题已在 2.1.0 版本中修复。

CVSS 8.5 · High EPSS 0.15% · P4

Affected Version Matrix 1

VendorProduct Version RangeStatus
helge17 tuxguitar < 2.1.0 affected
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I. Basic Information for CVE-2026-55543

Vulnerability Information
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Vulnerability Title
TuxGuitar: Arbitrary Code Execution via maliciously crafted `.tg` file
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
helge17 tuxguitar < 2.1.0 -

II. Public POCs for CVE-2026-55543

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III. Intelligence Information for CVE-2026-55543

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IV. Related Vulnerabilities

Same weakness: CWE-94

V. Comments for CVE-2026-55543

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