Vulnerability · Published Oct 26, 2026 · Assigned by VulnCheck

CVE-2026-116730Furnace through 0.6.8.3 Out-of-Bounds Read via FamiTracker Module Import

Medium 5.5

In plain English

A medium-severity out-of-bounds read in furnace from tildearrow. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities).

Severity (CVSS 3.1)5.5Medium

Exploit odds (30 days)0.1%top 96.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Furnace through 0.6.8.3 contains an out-of-bounds heap read vulnerability in DivEngine::loadFTM() in src/engine/fileOps/ftm.cpp, triggered by an unbounded DPCM note count during FamiTracker module import. Attackers can craft a .ftm, .dnm or 0CC/E-FamiTracker module with a 2A03 instrument note count above 120 to read past the noteMap array and crash Furnace when opened.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:13	furnace	no fix listed	DEBIAN-CVE-2026-116730
Debian:14	furnace	no fix listed	DEBIAN-CVE-2026-116730
Ubuntu:26.04:LTS	furnace	no fix listed	UBUNTU-CVE-2026-116730
Ubuntu:26.10	furnace	no fix listed	UBUNTU-CVE-2026-116730

Affected products (as reported)

Vendor	Product	Versions
tildearrow	furnace	0 – through 0.6.8.3

Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References

GitHub Issue #2966 issue-tracking
https://github.com/tildearrow/furnace product
https://github.com/tildearrow/furnace/commit/c120c72391e3229fe258e5759f43427febcb8693 patch
https://github.com/tildearrow/furnace/blob/v0.6.8.3/src/engine/fileOps/ftm.cpp#L981-L1017 technical-description
https://hackmd.io/@haindpwn/furnace-ftm-import-notemap-and-groove-subsong-oob third-party-advisory
VulnCheck Advisory: Furnace through 0.6.8.3 Out-of-Bounds Read via FamiTracker Module Import third-party-advisory