{"id":"CVE-2026-86872","kind":"vulnerability","aliases":["CVE-2026-86872"],"related":[],"title":"Safari and visionOS: crafted web content causes unexpected behavior","description":"A logic issue was addressed with improved state management. This issue is fixed in Safari 27, visionOS 27, watchOS 27. Processing maliciously crafted web content may lead to unexpected behavior.","summary":"A logic flaw in Safari, visionOS and watchOS lets maliciously crafted web content trigger unexpected behavior. The sources do not say whether this leads to code execution or data exposure.","severity":"medium","cvss":5.4,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["apple","other","safari","visionos","watchos"],"not_affected_if":["already-on-27"],"how_to_check":null,"fix":"- Update Safari to the version shipped with Safari 27\n- Update visionOS and watchOS to 27 or later","status":"open","published_at":"2026-10-20T01:17:25+00:00","first_seen_at":"2026-10-23T21:57:19+00:00","triaged_at":"2026-10-25T04:16:41+00:00","updated_at":"2026-10-25T04:16:41+00:00","category":"other","confidence":0.5,"triage":{"at":"2026-10-25T04:16:41Z","model":"claude-haiku-5-5","output":{"fix":"- Update Safari to the version shipped with Safari 27\n- Update visionOS and watchOS to 27 or later","reach":"internet","title":"Safari and visionOS: crafted web content causes unexpected behavior","impact":"low","summary":"A logic flaw in Safari, visionOS and watchOS lets maliciously crafted web content trigger unexpected behavior. The sources do not say whether this leads to code execution or data exposure.","category":"other","nicknames":[],"who_cares":["safari","visionos","watchos","apple"],"confidence":0.5,"needs_auth":"no","worst_case":"unexpected browser behavior from crafted web content; deeper impact unknown","analyst_note":"Check the Apple security content page for CVE-2026-86872 to confirm the impact type and the exact fixed build numbers.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["already-on-27"],"who_is_affected":"Users of Safari, visionOS and watchOS builds earlier than 27 who open untrusted web pages. Sources do not say whether third-party browsers or embedded web views are affected.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.000539,"input_tokens":3261,"output_tokens":426,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':11A,14A '-86872':12A,15A '27':66C,68C,70C 'address':55C 'appl':16B 'behavior':9A,36B,80C 'caus':7A 'code':46B 'content':6A,33B,75C 'craft':4A,31B,73C 'cve':10A,13A 'data':49B 'execut':47B 'exposur':50B 'fix':63C 'flaw':23B 'improv':57C 'issu':53C,61C 'lead':44B,77C 'let':29B 'logic':22B,52C 'malici':30B,72C 'manag':59C 'may':76C 'process':71C 'safari':1A,18B,25B,65C 'say':41B 'sourc':38B 'state':58C 'trigger':34B 'unexpect':8A,35B,79C 'visiono':3A,19B,26B,67C 'watcho':20B,28B,69C 'web':5A,32B,74C 'whether':42B","nicknames":[],"mitigations":[],"who_affected":"Users of Safari, visionOS and watchOS builds earlier than 27 who open untrusted web pages. Sources do not say whether third-party browsers or embedded web views are affected.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T01:17:25+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L","cvss_by":"134c704f-9b21-4f2e-91b3-4a467353bcc0","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-86872","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86872","severity":null,"published_at":"2026-10-20T01:17:25+00:00","modified_at":"2026-10-20T16:17:15+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"}