{"id":"CVE-2026-117989","kind":"vulnerability","aliases":["CVE-2026-117989"],"related":[],"title":"Firefox: use-after-free in Graphics component may let attackers run code","description":"Use-after-free in the Graphics component. This vulnerability was fixed in Firefox 159 and Firefox ESR 153.6.","summary":"A use-after-free bug in Firefox's Graphics component lets memory be reused after it is freed. The sources do not say what an attacker gets beyond that, and the fix ships in Firefox 159 and Firefox ESR 153.6.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","desktop","firefox","runtime"],"not_affected_if":["already-on-fixed-version"],"how_to_check":"- Run `firefox --version` (or check About Firefox) and compare against `159` for the release channel or `153.6` for ESR\n- unknown","fix":"- Update Firefox to `159` or later, or Firefox ESR to `153.6` or later","status":"open","published_at":"2026-10-27T14:16:56+00:00","first_seen_at":"2026-10-27T14:32:24+00:00","triaged_at":"2026-10-27T14:34:59+00:00","updated_at":"2026-10-27T14:34:59+00:00","category":"runtime","confidence":0.45,"triage":{"at":"2026-10-27T14:34:59Z","model":"claude-haiku-5-5","output":{"fix":"- Update Firefox to `159` or later, or Firefox ESR to `153.6` or later","reach":"unknown","title":"Firefox: use-after-free in Graphics component may let attackers run code","impact":"high","summary":"A use-after-free bug in Firefox's Graphics component lets memory be reused after it is freed. The sources do not say what an attacker gets beyond that, and the fix ships in Firefox 159 and Firefox ESR 153.6.","category":"runtime","nicknames":[],"who_cares":["firefox","desktop","browser"],"confidence":0.45,"needs_auth":"unknown","worst_case":"unknown; memory corruption in the browser, exact impact not stated","analyst_note":"Check the Mozilla security advisory for this CVE for exploitability, trigger conditions and whether it is memory-corruption with code execution; the NVD entry gives only the one-line description.","how_to_check":"- Run `firefox --version` (or check About Firefox) and compare against `159` for the release channel or `153.6` for ESR\n- unknown","needs_analyst":true,"not_affected_if":["already-on-fixed-version"],"who_is_affected":"Anyone running a Firefox build older than `159` (release) or older than `153.6` (ESR). The sources do not say which configurations or content are needed to trigger it, so unknown.","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000574,"input_tokens":3230,"output_tokens":502,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-117989':16A,19A '-2026':15A,18A '153.6':64B,83C '159':60B,79C 'attack':11A,50B 'beyond':52B 'browser':20B 'bug':29B 'code':13A 'compon':8A,34B,72C 'cve':14A,17A 'desktop':21B 'esr':63B,82C 'firefox':1A,22B,31B,59B,62B,78C,81C 'fix':56B,76C 'free':5A,28B,68C 'freed':42B 'get':51B 'graphic':7A,33B,71C 'let':10A,35B 'may':9A 'memori':36B 'reus':38B 'run':12A 'runtim':23B 'say':47B 'ship':57B 'sourc':44B 'use':3A,26B,66C 'use-after-fre':2A,25B,65C 'vulner':74C","nicknames":[],"mitigations":[],"who_affected":"Anyone running a Firefox build older than `159` (release) or older than `153.6` (ESR). The sources do not say which configurations or content are needed to trigger it, so unknown.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T14:16:56+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-117989","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-117989","severity":null,"published_at":"2026-10-27T14:16:56+00:00","modified_at":"2026-10-27T14:16:56+00:00","first_seen_at":"2026-10-27T14:32:24+00:00","fetched_at":"2026-10-27T14:32:24+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"}