{"id":"CVE-2026-86929","kind":"vulnerability","aliases":["CVE-2026-86929"],"related":[],"title":"Apple macOS: out-of-bounds write lets a crafted file run code","description":"An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2. Processing a maliciously crafted file may lead to arbitrary code execution.","summary":"An out-of-bounds write in an unnamed macOS component can be triggered by processing a maliciously crafted file. Apple says this may lead to arbitrary code execution.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["apple-devices","infrastructure","macos"],"not_affected_if":["unknown"],"how_to_check":"- unknown","fix":"- Update macOS to `27` (Golden Gate), `15.8.2` (Sequoia), or `26.7.2` (Tahoe), per the Apple advisory.","status":"open","published_at":"2026-10-26T21:20:30+00:00","first_seen_at":"2026-10-26T21:55:22+00:00","triaged_at":"2026-10-26T21:56:56+00:00","updated_at":"2026-10-26T21:56:56+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-10-26T21:56:56Z","model":"claude-haiku-5-5","output":{"fix":"- Update macOS to `27` (Golden Gate), `15.8.2` (Sequoia), or `26.7.2` (Tahoe), per the Apple advisory.","reach":"local","title":"Apple macOS: out-of-bounds write lets a crafted file run code","impact":"high","summary":"An out-of-bounds write in an unnamed macOS component can be triggered by processing a maliciously crafted file. Apple says this may lead to arbitrary code execution.","category":"infrastructure","nicknames":[],"who_cares":["macos","apple-devices"],"confidence":0.5,"needs_auth":"unknown","worst_case":"Attacker runs arbitrary code on the Mac via a crafted file.","analyst_note":"Find the Apple security advisory for CVE-2026-86929 to name the affected component, file type and patched builds.","how_to_check":"- unknown","needs_analyst":true,"not_affected_if":["unknown"],"who_is_affected":"Any Mac running macOS versions before the fixed releases can be affected if it processes the crafted file. The sources do not name the specific component or file type, so the exact exposure is unknown.","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000545,"input_tokens":3294,"output_tokens":432,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2026':15A,18A '-86929':16A,19A '15.8.2':78C '26.7.2':81C '27':75C 'address':62C 'appl':1A,21B,45B 'apple-devic':20B 'arbitrari':51B,90C 'bound':6A,29B,58C,65C 'check':66C 'code':13A,52B,91C 'compon':35B 'craft':10A,43B,85C 'cve':14A,17A 'devic':22B 'execut':53B,92C 'file':11A,44B,86C 'fix':70C 'gate':74C 'golden':73C 'improv':64C 'infrastructur':23B 'issu':60C,68C 'lead':49B,88C 'let':8A 'maco':2A,24B,34B,72C,76C,79C 'malici':42B,84C 'may':48B,87C 'out-of-bound':3A,26B,55C 'process':40B,82C 'run':12A 'say':46B 'sequoia':77C 'taho':80C 'trigger':38B 'unnam':33B 'write':7A,30B,59C","nicknames":[],"mitigations":[],"who_affected":"Any Mac running macOS versions before the fixed releases can be affected if it processes the crafted file. The sources do not name the specific component or file type, so the exact exposure is unknown.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-26T21:20:30+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-86929","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86929","severity":null,"published_at":"2026-10-26T21:20:30+00:00","modified_at":"2026-10-26T21:20:30+00:00","first_seen_at":"2026-10-26T21:55:22+00:00","fetched_at":"2026-10-26T21:55:22+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"}