All vulnerabilities
CVE-2026-55543GHSA-v66p-c82h-w3cq

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

helge17 tuxguitar
Open in ThreatlineRecord JSON
CVSS
8.5High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.15%Chance of exploitation activity in the next 30 days, higher than 3% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in2.1.0Fixed versionGitHub
Published16 Oct 2026Updated 16 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 2

  • tuxguitaraffected: < 2.1.0CVE List
  • tuxguitar<= 2.0.1GitHub

References 3