{"id":"CVE-2026-116730","kind":"vulnerability","aliases":["CVE-2026-116730"],"related":[],"title":"Furnace: crafted FamiTracker module reads past heap buffer on import","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.","summary":"Furnace, a chiptune tracker, has an out-of-bounds heap read in its FamiTracker module loader when a 2A03 instrument declares more than 120 notes. An attacker who gets a user to open a crafted .ftm, .dnm or 0CC/E-FamiTracker file can crash Furnace.","severity":"medium","cvss":6.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["desktop","furnace","music-production","package"],"not_affected_if":["newer-version","no-ftm-import"],"how_to_check":"- Run `furnace --version` or check the installed Furnace version in the app's About dialog.\n- Check whether the installed version is `0.6.8.3` or earlier.","fix":"- Move Furnace to a release newer than `0.6.8.3` once the upstream fix is published (unknown from the sources).\n- Until then, only open FamiTracker modules from trusted sources.","status":"open","published_at":"2026-10-26T22:16:56+00:00","first_seen_at":"2026-10-26T22:25:33+00:00","triaged_at":"2026-10-26T22:27:53+00:00","updated_at":"2026-10-26T22:27:53+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-26T22:27:53Z","model":"claude-haiku-5-5","output":{"fix":"- Move Furnace to a release newer than `0.6.8.3` once the upstream fix is published (unknown from the sources).\n- Until then, only open FamiTracker modules from trusted sources.","reach":"local","title":"Furnace: crafted FamiTracker module reads past heap buffer on import","impact":"low","summary":"Furnace, a chiptune tracker, has an out-of-bounds heap read in its FamiTracker module loader when a 2A03 instrument declares more than 120 notes. An attacker who gets a user to open a crafted .ftm, .dnm or 0CC/E-FamiTracker file can crash Furnace.","category":"package","nicknames":[],"who_cares":["furnace","desktop","music-production"],"confidence":0.6,"needs_auth":"no","worst_case":"Furnace crashes when a crafted module is opened; memory disclosure is possible.","analyst_note":"","how_to_check":"- Run `furnace --version` or check the installed Furnace version in the app's About dialog.\n- Check whether the installed version is `0.6.8.3` or earlier.","needs_analyst":false,"not_affected_if":["no-ftm-import","newer-version"],"who_is_affected":"Only people who open FamiTracker-format modules (.ftm, .dnm, 0CC/E-FamiTracker) in Furnace on a version through 0.6.8.3. Servers or pipelines that do not import these files are not exposed.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"unknown"},"cost_usd":0.000605,"input_tokens":3384,"output_tokens":534,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-116730':13A,16A '-2026':12A,15A '0.6.8.3':69C '0cc/e-famitracker':62B,102C '120':47B,111C '2a03':42B,106C 'array':117C 'attack':50B,95C 'bound':32B,75C 'buffer':8A 'chiptun':25B 'contain':70C 'count':90C,109C 'craft':2A,58B,97C 'crash':65B,119C 'cve':11A,14A 'declar':44B 'desktop':17B 'divengin':80C 'dnm':60B,100C 'dpcm':88C 'famitrack':3A,37B,92C 'file':63B 'ftm':59B,99C 'furnac':1A,18B,23B,66B,67C,120C 'get':52B 'heap':7A,33B,76C 'import':10A,94C 'instrument':43B,107C 'loader':39B 'loadftm':81C 'modul':4A,38B,93C,103C 'music':20B 'music-product':19B 'note':48B,89C,108C 'notemap':116C 'open':56B,122C 'out-of-bound':29B,72C 'packag':22B 'past':6A,114C 'product':21B 'read':5A,34B,77C,113C 'src/engine/fileops/ftm.cpp':83C 'tracker':26B 'trigger':84C 'unbound':87C 'user':54B 'vulner':78C","nicknames":[],"mitigations":[],"who_affected":"Only people who open FamiTracker-format modules (.ftm, .dnm, 0CC/E-FamiTracker) in Furnace on a version through 0.6.8.3. Servers or pipelines that do not import these files are not exposed.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-26T22:16:56+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"disclosure@vulncheck.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-116730","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116730","severity":null,"published_at":"2026-10-26T22:16:56+00:00","modified_at":"2026-10-26T22:16:56+00:00","first_seen_at":"2026-10-26T22:25:33+00:00","fetched_at":"2026-10-26T22:25:33+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}