{"id":"CVE-2026-118017","kind":"vulnerability","aliases":["CVE-2026-118017"],"related":[],"title":"Firefox: use-after-free in SVG component could crash or run code","description":"Use-after-free in the SVG component. This vulnerability was fixed in Firefox 159.","summary":"A use-after-free bug in Firefox's SVG component lets memory be reused after it is freed. The sources do not say what an attacker can do with it beyond that, and the record gives no severity.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["desktop","firefox","other"],"not_affected_if":[],"how_to_check":"- Check the installed Firefox version in the About Firefox menu or with `firefox --version`\n- unknown","fix":"- Update Firefox to `159` or later\n- unknown","status":"open","published_at":"2026-10-27T14:16:59+00:00","first_seen_at":"2026-10-27T14:32:25+00:00","triaged_at":"2026-10-27T14:33:28+00:00","updated_at":"2026-10-27T14:33:28+00:00","category":"other","confidence":0.4,"triage":{"at":"2026-10-27T14:33:28Z","model":"claude-haiku-5-5","output":{"fix":"- Update Firefox to `159` or later\n- unknown","reach":"unknown","title":"Firefox: use-after-free in SVG component could crash or run code","impact":"medium","summary":"A use-after-free bug in Firefox's SVG component lets memory be reused after it is freed. The sources do not say what an attacker can do with it beyond that, and the record gives no severity.","category":"other","nicknames":[],"who_cares":["firefox","desktop"],"confidence":0.4,"needs_auth":"unknown","worst_case":"unknown, memory corruption in the browser","analyst_note":"Check the Mozilla security advisory for the Firefox 159 release to confirm the trigger, severity and whether it is exploited.","how_to_check":"- Check the installed Firefox version in the About Firefox menu or with `firefox --version`\n- unknown","needs_analyst":true,"not_affected_if":[],"who_is_affected":"Anyone running Firefox before version `159`, on any system where Firefox is installed. The sources do not say whether rendering SVG content from web pages or files is needed to trigger it. unknown","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000532,"input_tokens":3215,"output_tokens":422,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-118017':16A,19A '-2026':15A,18A '159':75C 'attack':48B 'beyond':53B 'bug':27B 'code':13A 'compon':8A,32B,68C 'could':9A 'crash':10A 'cve':14A,17A 'desktop':20B 'firefox':1A,21B,29B,74C 'fix':72C 'free':5A,26B,64C 'freed':40B 'give':58B 'let':33B 'memori':34B 'record':57B 'reus':36B 'run':12A 'say':45B 'sever':60B 'sourc':42B 'svg':7A,31B,67C 'use':3A,24B,62C 'use-after-fre':2A,23B,61C 'vulner':70C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Firefox before version `159`, on any system where Firefox is installed. The sources do not say whether rendering SVG content from web pages or files is needed to trigger it. unknown","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-2026-118017","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118017","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"}