{"id":"CVE-2026-117983","kind":"vulnerability","aliases":["CVE-2026-117983"],"related":[],"title":"Firefox: use-after-free in Graphics component may allow code execution","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 the Graphics component of Firefox can be triggered to corrupt memory. The sources do not say what an attacker gains beyond that, so treat the impact as unconfirmed.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","desktop","firefox","other"],"not_affected_if":["already-patched"],"how_to_check":"- Check the installed Firefox version in the About Firefox dialog, or run `firefox --version`\n- Check the ESR build with `firefox --version` on systems using Firefox ESR; compare against 153.6\n- unknown for any other check, as the sources do not say","fix":"- Update Firefox to `159` or later\n- Update Firefox ESR to `153.6` or later\n- unknown for any other action, as the sources do not say","status":"open","published_at":"2026-10-27T14:16:56+00:00","first_seen_at":"2026-10-27T14:32:24+00:00","triaged_at":"2026-10-27T14:35:07+00:00","updated_at":"2026-10-27T14:35:07+00:00","category":"other","confidence":0.4,"triage":{"at":"2026-10-27T14:35:07Z","model":"claude-haiku-5-5","output":{"fix":"- Update Firefox to `159` or later\n- Update Firefox ESR to `153.6` or later\n- unknown for any other action, as the sources do not say","reach":"unknown","title":"Firefox: use-after-free in Graphics component may allow code execution","impact":"medium","summary":"A use-after-free bug in the Graphics component of Firefox can be triggered to corrupt memory. The sources do not say what an attacker gains beyond that, so treat the impact as unconfirmed.","category":"other","nicknames":[],"who_cares":["firefox","desktop","browsers"],"confidence":0.4,"needs_auth":"unknown","worst_case":"unknown; sources only say memory is freed then reused","analyst_note":"Check the Mozilla security advisory for this CVE for severity, trigger conditions, and whether it is exploitable in the wild; the NVD link alone gives no detail.","how_to_check":"- Check the installed Firefox version in the About Firefox dialog, or run `firefox --version`\n- Check the ESR build with `firefox --version` on systems using Firefox ESR; compare against 153.6\n- unknown for any other check, as the sources do not say","needs_analyst":true,"not_affected_if":["already-patched"],"who_is_affected":"Teams running Firefox or Firefox ESR on desktops or servers are affected by versions before the fixed releases. The sources do not say which platforms or configurations are most exposed, so unknown. Systems that already run Firefox 159 or ESR 153.6 are not affected.","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000606,"input_tokens":3230,"output_tokens":565,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-117983':15A,18A '-2026':14A,17A '153.6':75C '159':71C 'allow':10A 'attack':47B 'beyond':49B 'browser':19B 'bug':27B 'code':11A 'compon':8A,31B,64C 'corrupt':38B 'cve':13A,16A 'desktop':20B 'esr':74C 'execut':12A 'firefox':1A,21B,33B,70C,73C 'fix':68C 'free':5A,26B,60C 'gain':48B 'graphic':7A,30B,63C 'impact':54B 'may':9A 'memori':39B 'say':44B 'sourc':41B 'treat':52B 'trigger':36B 'unconfirm':56B 'use':3A,24B,58C 'use-after-fre':2A,23B,57C 'vulner':66C","nicknames":[],"mitigations":[],"who_affected":"Teams running Firefox or Firefox ESR on desktops or servers are affected by versions before the fixed releases. The sources do not say which platforms or configurations are most exposed, so unknown. Systems that already run Firefox 159 or ESR 153.6 are not affected.","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-2026-117983","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-117983","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"}