{"id":"CVE-2023-28205","kind":"vulnerability","aliases":["CVE-2023-28205"],"related":[],"title":"A use after free issue was addressed with improved memory management","description":"Apple iOS, iPadOS, macOS, and Safari WebKit contain a use-after-free vulnerability that leads to code execution when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.\n\nCISA required action: Apply updates per vendor instructions.","summary":"A use-after-free bug in Apple's WebKit engine, used by iOS, iPadOS, macOS and Safari, lets malicious web content run code. CISA lists it as actively exploited in the wild.","severity":"critical","cvss":8.8,"epss":null,"exploited":true,"exploited_at":"2023-04-10T00:00:00+00:00","products":[{"name":"Apple Multiple Products","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"apple safari","fixed":["16.4.1"],"affected":"< 16.4.1","ecosystem":"vendor"},{"name":"apple ipados","fixed":["15.7.5"],"affected":"< 15.7.5","ecosystem":"vendor"},{"name":"apple ipados","fixed":["16.4.1"],"affected":">= 16.0, < 16.4.1","ecosystem":"vendor"},{"name":"apple iphone os","fixed":["15.7.5"],"affected":"< 15.7.5","ecosystem":"vendor"},{"name":"apple iphone os","fixed":["16.4.1"],"affected":">= 16.0, < 16.4.1","ecosystem":"vendor"},{"name":"apple macos","fixed":["13.3.1"],"affected":"< 13.3.1","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["apps-embedding-webkit","exploited","ios","ipados","macos","safari","vendor","webkit"],"not_affected_if":["unpatched-os-not-in-use"],"how_to_check":"Check the device OS version under Settings > General > About (iOS/iPadOS) or Apple menu > About This Mac (macOS) and compare it to Apple's security notes; unknown for fleet-wide checks.","fix":"Update iOS, iPadOS, macOS and Safari to a release that includes the Apple fix for CVE-2023-28205, per vendor instructions; unknown for the exact build number in the sources.","status":"open","published_at":"2023-04-10T00:00:00+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:06:58+00:00","updated_at":"2026-10-23T22:29:04+00:00","category":"vendor","confidence":0.7,"triage":{"at":"2026-10-23T21:06:58Z","model":"claude-haiku-5-5","output":{"fix":"Update iOS, iPadOS, macOS and Safari to a release that includes the Apple fix for CVE-2023-28205, per vendor instructions; unknown for the exact build number in the sources.","reach":"internet","impact":"high","summary":"A use-after-free bug in Apple's WebKit engine, used by iOS, iPadOS, macOS and Safari, lets malicious web content run code. CISA lists it as actively exploited in the wild.","category":"vendor","who_cares":["ios","ipados","macos","safari","webkit","apps-embedding-webkit"],"confidence":0.7,"needs_auth":"no","worst_case":"Attacker runs code on the device after the user loads crafted web content","analyst_note":"Find the exact patched Apple OS and Safari versions from Apple's security releases page for CVE-2023-28205, since the sources give no version.","how_to_check":"Check the device OS version under Settings > General > About (iOS/iPadOS) or Apple menu > About This Mac (macOS) and compare it to Apple's security notes; unknown for fleet-wide checks.","needs_analyst":true,"not_affected_if":["unpatched-os-not-in-use"],"user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"critical"},"cost_usd":0.000508,"input_tokens":2858,"output_tokens":444,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2023':13A,16A '-28205':14A,17A 'action':134C 'activ':74B 'address':7A 'app':36B 'appl':53B,79C,118C,123C 'apple':18A,21A,23A,25A,27A,30A,33A 'appli':135C 'apps-embedding-webkit':35B 'bug':51B 'cisa':70B,132C 'code':69B,96C 'contain':86C 'content':67B,103C 'could':106C 'craft':101C 'cve':12A,15A 'embed':37B 'engin':56B 'execut':97C 'exploit':39B,75B 'free':4A,50B,91C 'html':108C,130C 'impact':107C 'improv':9A 'includ':113C 'instruct':139C 'io':40B,59B,80C 'ipado':41B,60B,81C 'ipados':24A,26A 'iphone':28A,31A 'issu':5A 'lead':94C 'let':64B 'limit':116C 'list':71B 'maco':42B,61B,82C 'macos':34A 'malici':65B,100C 'manag':11A 'memori':10A 'multiple':19A 'non':122C 'non-appl':121C 'os':29A,32A 'parser':109C 'per':137C 'process':99C,131C 'product':124C 'products':20A 'reli':126C 'requir':133C 'run':68B 'safari':22A,43B,63B,84C,119C 'updat':136C 'use':2A,48B,57B,89C,111C 'use-after-fre':47B,88C 'vendor':44B,138C 'vulner':92C,105C 'web':66B,102C 'webkit':38B,45B,55B,85C,112C,128C 'wild':78B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2023-04-10T00:00:00+00:00","kev":{"dateAdded":"2023-04-10","dueDate":"2023-05-01","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2023-28205","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-28205","severity":null,"published_at":"2023-04-10T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T16:39:47+00:00","note":null},{"source":"nvd","external_id":"CVE-2023-28205","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-28205","severity":null,"published_at":"2023-04-10T19:15:07+00:00","modified_at":"2026-06-17T05:47:06+00:00","first_seen_at":"2026-10-23T22:29:04+00:00","fetched_at":"2026-10-23T22:29:04+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"}