{"id":"CVE-2026-118022","kind":"vulnerability","aliases":["CVE-2026-118022"],"related":[],"title":"Firefox: use-after-free in Disability Access APIs escapes sandbox","description":"Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 159.","summary":"A use-after-free bug in the Disability Access APIs component of Firefox allows a sandbox escape. An attacker who can run content in the browser could break out of the renderer sandbox.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","desktop","firefox","runtime"],"not_affected_if":["firefox-159-or-later"],"how_to_check":"- Check the installed Firefox version with `firefox --version` or Help > About Firefox; versions below `159` are affected per the description.\n- Check for managed or pinned Firefox builds on managed fleets, including ESR channels.","fix":"- Update Firefox to `159` or later.","status":"open","published_at":"2026-10-27T14:16:59+00:00","first_seen_at":"2026-10-27T14:32:25+00:00","triaged_at":"2026-10-27T14:33:23+00:00","updated_at":"2026-10-27T14:33:23+00:00","category":"runtime","confidence":0.5,"triage":{"at":"2026-10-27T14:33:23Z","model":"claude-haiku-5-5","output":{"fix":"- Update Firefox to `159` or later.","reach":"unknown","title":"Firefox: use-after-free in Disability Access APIs escapes sandbox","impact":"high","summary":"A use-after-free bug in the Disability Access APIs component of Firefox allows a sandbox escape. An attacker who can run content in the browser could break out of the renderer sandbox.","category":"runtime","nicknames":[],"who_cares":["firefox","browsers","desktop"],"confidence":0.5,"needs_auth":"unknown","worst_case":"attacker escapes browser sandbox to run code outside it","analyst_note":"Check the Mozilla security advisory for this CVE to confirm the ESR fix versions and whether user interaction or specific content is required.","how_to_check":"- Check the installed Firefox version with `firefox --version` or Help > About Firefox; versions below `159` are affected per the description.\n- Check for managed or pinned Firefox builds on managed fleets, including ESR channels.","needs_analyst":true,"not_affected_if":["firefox-159-or-later"],"who_is_affected":"Anyone running Firefox builds before 159 is potentially exposed, since the flaw is in the browser itself rather than a server component. Systems that have already moved to Firefox 159 or later are not affected. Sources do not say whether ESR branches are covered by the same fix version.","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000578,"input_tokens":3241,"output_tokens":507,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-118022':14A,17A '-2026':13A,16A '159':76C 'access':8A,31B,67C 'allow':36B 'api':9A,32B,68C 'attack':41B 'break':50B 'browser':18B,48B 'bug':27B 'compon':33B,69C 'content':45B 'could':49B 'cve':12A,15A 'desktop':19B 'disabl':7A,30B,66C 'due':58C 'escap':10A,39B,57C 'firefox':1A,20B,35B,75C 'fix':73C 'free':5A,26B,63C 'render':54B 'run':44B 'runtim':21B 'sandbox':11A,38B,55B,56C 'use':3A,24B,61C 'use-after-fre':2A,23B,60C 'vulner':71C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Firefox builds before 159 is potentially exposed, since the flaw is in the browser itself rather than a server component. Systems that have already moved to Firefox 159 or later are not affected. Sources do not say whether ESR branches are covered by the same fix version.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T14:16:59+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-118022","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118022","severity":null,"published_at":"2026-10-27T14:16:59+00:00","modified_at":"2026-10-27T14:16:59+00:00","first_seen_at":"2026-10-27T14:32:25+00:00","fetched_at":"2026-10-27T14:32:25+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"}