{"id":"CVE-2026-86918","kind":"vulnerability","aliases":["CVE-2026-86918"],"related":[],"title":"Apple OS: crafted image crashes apps through an out-of-bounds write","description":"An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 27 and iPadOS 27, macOS Golden Gate 27, tvOS 27, visionOS 27, watchOS 27. Processing a maliciously crafted image may lead to unexpected app termination.","summary":"An out-of-bounds write in Apple's image processing can be triggered by a maliciously crafted image, causing the app handling it to terminate unexpectedly. The sources describe a crash and do not claim code execution.","severity":"medium","cvss":4.3,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["apple","ios","ipados","macos","tvos","vendor","visionos","watchos"],"not_affected_if":["already-patched-os"],"how_to_check":"- Check the device OS version in Settings > General > About; the sources do not list affected versions beyond the fixed releases.","fix":"- Update to iOS 27, iPadOS 27, macOS Golden Gate 27, tvOS 27, visionOS 27 or watchOS 27, the releases that address the issue.","status":"open","published_at":"2026-10-20T01:17:27+00:00","first_seen_at":"2026-10-23T21:57:19+00:00","triaged_at":"2026-10-25T04:39:28+00:00","updated_at":"2026-10-25T04:39:28+00:00","category":"vendor","confidence":0.6,"triage":{"at":"2026-10-25T04:39:28Z","model":"claude-haiku-5-5","output":{"fix":"- Update to iOS 27, iPadOS 27, macOS Golden Gate 27, tvOS 27, visionOS 27 or watchOS 27, the releases that address the issue.","reach":"unknown","title":"Apple OS: crafted image crashes apps through an out-of-bounds write","impact":"low","summary":"An out-of-bounds write in Apple's image processing can be triggered by a maliciously crafted image, causing the app handling it to terminate unexpectedly. The sources describe a crash and do not claim code execution.","category":"vendor","nicknames":[],"who_cares":["apple","ios","ipados","macos","tvos","visionos","watchos"],"confidence":0.6,"needs_auth":"no","worst_case":"Crafted image crashes the app that opens it","analyst_note":"","how_to_check":"- Check the device OS version in Settings > General > About; the sources do not list affected versions beyond the fixed releases.","needs_analyst":false,"not_affected_if":["already-patched-os"],"who_is_affected":"Anyone running an affected Apple operating system version that processes images, such as a user opening a crafted image in a messaging app or browser. The sources do not say which apps or image formats are involved. unknown beyond that.","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000563,"input_tokens":3307,"output_tokens":464,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':15A,18A '-86918':16A,19A '27':85C,88C,92C,94C,96C,98C 'address':74C 'app':6A,49B,108C 'appl':1A,20B,35B 'bound':12A,32B,70C,77C 'caus':47B 'check':78C 'claim':63B 'code':64B 'craft':3A,45B,102C 'crash':5A,59B 'cve':14A,17A 'describ':57B 'execut':65B 'fix':82C 'gate':91C 'golden':90C 'handl':50B 'imag':4A,37B,46B,103C 'improv':76C 'io':21B,84C 'ipado':22B,87C 'issu':72C,80C 'lead':105C 'maco':23B,89C 'malici':44B,101C 'may':104C 'os':2A 'out-of-bound':9A,29B,67C 'process':38B,99C 'sourc':56B 'termin':53B,109C 'trigger':41B 'tvos':24B,93C 'unexpect':54B,107C 'vendor':25B 'visiono':26B,95C 'watcho':27B,97C 'write':13A,33B,71C","nicknames":[],"mitigations":[],"who_affected":"Anyone running an affected Apple operating system version that processes images, such as a user opening a crafted image in a messaging app or browser. The sources do not say which apps or image formats are involved. unknown beyond that.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T01:17:27+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","cvss_by":"134c704f-9b21-4f2e-91b3-4a467353bcc0","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-86918","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86918","severity":null,"published_at":"2026-10-20T01:17:27+00:00","modified_at":"2026-10-20T15:17:35+00:00","first_seen_at":"2026-10-23T21:57:19+00:00","fetched_at":"2026-10-23T22:28:57+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"}