Arbitrary code execution in TuxGuitar via crafted .tg file
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-94.
Summary
TuxGuitar, an open-source guitar tablature editor, is affected before 2.1.0. A crafted .tg file can point the soundbank path at an archive containing an attacker-supplied class, which TuxGuitar loads and instantiates without verification (CWE-94). If a user opens the malicious file, the attacker's code runs with the privileges of the TuxGuitar process.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Description from the CNA
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
Upgrade TuxGuitar to version 2.1.0, which fixes this issue.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
- Fix · CNA tuxguitar (helge17) Fixed in 2.1.0
Timeline
- 2026-10-16 Threatist record created from CVE-2026-55543
- 2026-10-18 Priority changed: MEDIUM → LOW
- 2026-10-28 CISA SSVC decision points changed
- 2026-10-28 Priority changed: LOW → HIGH
References
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences