Medium severity · published Oct 26, 2026
CVE-2026-116731
Furnace through 0.6.8.3 Out-of-Bounds Write via FamiTracker GROOVES Block Import
New
6.1
CVSS
0.1%
EPSS
No
On KEV
Description
Furnace through 0.6.8.3 contains an out-of-bounds write vulnerability in DivEngine::loadFTM() that allows attackers to corrupt heap memory via an unchecked subsong index in the GROOVES block. Attackers can craft a FamiTracker module with a subsong count of 2 or more to write a groove pattern past the subsong vector, crashing Furnace when opened.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
Low
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 3% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FU
furnace · tildearrow
through 0.6.8.3 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-116731
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-116731
github.com
https://github.com/tildearrow/furnace
github.com
https://github.com/tildearrow/furnace/blob/v0.6.8.3/src/engine/fileOps/ftm.cpp#L1597-L1605
github.com
https://github.com/tildearrow/furnace/commit/c120c72391e3229fe258e5759f43427febcb8693
github.com
https://github.com/tildearrow/furnace/issues/2966
hackmd.io
https://hackmd.io/@haindpwn/furnace-ftm-import-notemap-and-groove-subsong-oob
www.vulncheck.com
https://www.vulncheck.com/advisories/furnace-through-0.6.8.3-out-of-bounds-write-via-famitracker-grooves-block-import
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