Out-of-bounds Read in Tildearrow Furnace
CVE-2026-116730
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.
Vulnerability class: Buffer Overflow
Published .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/tildearrow/furnace/issues/2966 (issue-tracking)
- github.com/tildearrow/furnace (product)
- github.com/tildearrow/furnace/commit/c120c72391e3229fe258e5759f43427febcb8693 (patch)
- github.com/tildearrow/furnace/blob/v0.6.8.3/src/engine/fileOps/ftm.cpp (technical-description)
- hackmd.io/@haindpwn/furnace-ftm-import-notemap-and-groove-subsong-oob (third-party-advisory)
- www.vulncheck.com/advisories/furnace-through-0.6.8.3-out-of-bounds-read-via-fam… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-116730?
- CVE-2026-116730 is a medium-severity vulnerability in Tildearrow Furnace, classified under Out-of-bounds Read. CVSS score: 5.5/10. Published 2026-10-26.
- How severe is CVE-2026-116730?
- Medium severity. CVSS v3 base score is 5.5 out of 10.