{"id":"CVE-2026-118013","kind":"vulnerability","aliases":["CVE-2026-118013"],"related":[],"title":"Firefox: use-after-free in image, video and HTML frame layout","description":"Use-after-free in the Layout: Images, Video, and HTML Frames component. This vulnerability was fixed in Firefox 159.","summary":"A use-after-free bug in Firefox's Layout component for images, video and HTML frames can corrupt memory when a page triggers it. The sources do not say what an attacker can run or read after triggering it.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["desktop-browsers","firefox","runtime"],"not_affected_if":["firefox-159-or-later"],"how_to_check":"- Run `firefox --version` (or check About Firefox) and compare against the fixed release `159`.\n- unknown for anything beyond the version check; the sources do not give further detail.","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":"2026-10-27T14:33:32+00:00","updated_at":"2026-10-27T14:33:32+00:00","category":"runtime","confidence":0.4,"triage":{"at":"2026-10-27T14:33:32Z","model":"claude-haiku-5-5","output":{"fix":"- Update Firefox to `159` or later.","reach":"internet","title":"Firefox: use-after-free in image, video and HTML frame layout","impact":"high","summary":"A use-after-free bug in Firefox's Layout component for images, video and HTML frames can corrupt memory when a page triggers it. The sources do not say what an attacker can run or read after triggering it.","category":"runtime","nicknames":[],"who_cares":["firefox","desktop-browsers"],"confidence":0.4,"needs_auth":"no","worst_case":"unknown; use-after-free may allow memory corruption in the browser","analyst_note":"Check the Mozilla security advisory for CVE-2026-118013 to confirm severity, exploitation requirements and whether it is exploited in the wild.","how_to_check":"- Run `firefox --version` (or check About Firefox) and compare against the fixed release `159`.\n- unknown for anything beyond the version check; the sources do not give further detail.","needs_analyst":true,"not_affected_if":["firefox-159-or-later"],"who_is_affected":"Anyone running Firefox older than version 159 with normal browsing enabled. The sources do not say whether the bug needs a particular page, setting or user action to be reached, so unknown beyond that.","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000562,"input_tokens":3243,"output_tokens":475,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-118013':15A,18A '-2026':14A,17A '159':82C 'attack':56B 'browser':21B 'bug':29B 'compon':34B,75C 'corrupt':42B 'cve':13A,16A 'desktop':20B 'desktop-brows':19B 'firefox':1A,22B,31B,81C 'fix':79C 'frame':11A,40B,74C 'free':5A,28B,66C 'html':10A,39B,73C 'imag':7A,36B,70C 'layout':12A,33B,69C 'memori':43B 'page':46B 'read':60B 'run':58B 'runtim':23B 'say':53B 'sourc':50B 'trigger':47B,62B 'use':3A,26B,64C 'use-after-fre':2A,25B,63C 'video':8A,37B,71C 'vulner':77C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Firefox older than version 159 with normal browsing enabled. The sources do not say whether the bug needs a particular page, setting or user action to be reached, so unknown beyond that.","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-2026-118013","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118013","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"}