Medium 6.1Published Oct 26, 2026

CVE-2026-116731Furnace through 0.6.8.3 Out-of-Bounds Write via FamiTracker GROOVES Block Import

Updated under an hour ago (Oct 29, 2026, 7:50 AM ET)

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It affects tildearrow furnace. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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: 6.1 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
Weakness (CWE): CWE-129
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Oct 26, 2026
First seen by InfoSec Signals: Oct 26, 2026

Affected products

Affected products

tildearrow furnace tildearrow:furnace (from the name)	through 0.6.8.3	CNA record

References

References

https://github.com/tildearrow/furnace/issues/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#L1597-L1605	technical-description
https://hackmd.io/@haindpwn/furnace-ftm-import-notemap-and-groove-subsong-oob	third-party-advisory
https://www.vulncheck.com/advisories/furnace-through-0.6.8.3-out-of-bounds-write-via-famitracker-grooves-block-import	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.