{"id":"CVE-2026-118009","kind":"vulnerability","aliases":["CVE-2026-118009"],"related":[],"title":"Firefox: integer overflow and use-after-free in Graphics Text component","description":"Integer overflow, use-after-free in the Graphics: Text component. This vulnerability was fixed in Firefox 159.","summary":"Firefox has an integer overflow and a use-after-free in its Graphics: Text component. The sources do not say what an attacker gets from it, but memory corruption of this kind can be used to run code.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["desktop-browsers","firefox","other"],"not_affected_if":["firefox-159-or-later"],"how_to_check":"- Check the installed Firefox version against the fixed release, for example with `firefox --version` on Linux or the About Firefox page.","fix":"- Update Firefox to `159` or later.","status":"open","published_at":"2026-10-27T14:16:58+00:00","first_seen_at":"2026-10-27T14:32:25+00:00","triaged_at":"2026-10-27T14:33:36+00:00","updated_at":"2026-10-27T14:33:36+00:00","category":"other","confidence":0.5,"triage":{"at":"2026-10-27T14:33:36Z","model":"claude-haiku-5-5","output":{"fix":"- Update Firefox to `159` or later.","reach":"unknown","title":"Firefox: integer overflow and use-after-free in Graphics Text component","impact":"high","summary":"Firefox has an integer overflow and a use-after-free in its Graphics: Text component. The sources do not say what an attacker gets from it, but memory corruption of this kind can be used to run code.","category":"other","nicknames":[],"who_cares":["firefox","desktop-browsers"],"confidence":0.5,"needs_auth":"unknown","worst_case":"unknown; memory corruption could allow code execution in the browser","analyst_note":"Check the NVD entry at https://nvd.nist.gov/vuln/detail/CVE-2026-118009 and Mozilla's advisory for severity, trigger conditions and whether it is exploited.","how_to_check":"- Check the installed Firefox version against the fixed release, for example with `firefox --version` on Linux or the About Firefox page.","needs_analyst":true,"not_affected_if":["firefox-159-or-later"],"who_is_affected":"Anyone running Firefox older than version 159 is affected. The sources do not say whether the flaw needs a particular page, setting or platform to trigger, and they do not describe the reach. Systems that do not run Firefox can skip it.","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000566,"input_tokens":3235,"output_tokens":486,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-118009':15A,18A '-2026':14A,17A '159':79C 'attack':46B 'browser':21B 'code':61B 'compon':12A,38B,72C 'corrupt':52B 'cve':13A,16A 'desktop':20B 'desktop-brows':19B 'firefox':1A,22B,23B,78C 'fix':76C 'free':8A,33B,67C 'get':47B 'graphic':10A,36B,70C 'integ':2A,26B,62C 'kind':55B 'memori':51B 'overflow':3A,27B,63C 'run':60B 'say':43B 'sourc':40B 'text':11A,37B,71C 'use':6A,31B,58B,65C 'use-after-fre':5A,30B,64C 'vulner':74C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Firefox older than version 159 is affected. The sources do not say whether the flaw needs a particular page, setting or platform to trigger, and they do not describe the reach. Systems that do not run Firefox can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T14:16:58+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-118009","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118009","severity":null,"published_at":"2026-10-27T14:16:58+00:00","modified_at":"2026-10-27T14:16:58+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"}