CVE-2026-55543

TuxGuitar: Arbitrary Code Execution via maliciously crafted `.tg` file

State: Published
Severity: 8.5 High
Published: Oct 16, 2026
Updated: Oct 28, 2026
Reserved: Jun 16, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	8.5 High	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	GitHub_M

Weaknesses

CWE-94 Improper Control of Generation of Code ('Code Injection')
CWE-470 Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')

Affected Products

Product	Versions
tuxguitarhelge17	< 2.1.0Affected

References

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