{"id":"CVE-2026-117908","kind":"vulnerability","aliases":["CVE-2026-117908"],"related":[],"title":"Firefox: use-after-free in image library lets attacker run code","description":"Use-after-free in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, and Firefox ESR 153.6.","summary":"A use-after-free bug in Firefox's Graphics ImageLib component can corrupt memory when a crafted image is processed. The sources do not say what an attacker gains beyond that, so the exact impact is unconfirmed.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","desktop","esr","firefox","runtime"],"not_affected_if":["already-on-fixed-version"],"how_to_check":"- Run `firefox --version` (or check Help > About) and compare against `159` and ESR `115.44` and `153.6`\n- Check whether browsers are managed centrally with an update policy","fix":"- Update Firefox to `159` or later\n- Update Firefox ESR to `115.44` or `153.6`","status":"open","published_at":"2026-10-27T14:16:46+00:00","first_seen_at":"2026-10-27T14:32:22+00:00","triaged_at":"2026-10-27T14:37:31+00:00","updated_at":"2026-10-27T14:37:31+00:00","category":"runtime","confidence":0.5,"triage":{"at":"2026-10-27T14:37:31Z","model":"claude-haiku-5-5","output":{"fix":"- Update Firefox to `159` or later\n- Update Firefox ESR to `115.44` or `153.6`","reach":"internet","title":"Firefox: use-after-free in image library lets attacker run code","impact":"high","summary":"A use-after-free bug in Firefox's Graphics ImageLib component can corrupt memory when a crafted image is processed. The sources do not say what an attacker gains beyond that, so the exact impact is unconfirmed.","category":"runtime","nicknames":[],"who_cares":["firefox","browsers","desktop","esr"],"confidence":0.5,"needs_auth":"no","worst_case":"unknown","analyst_note":"Check the Mozilla security advisory for the CVE to confirm affected version ranges and whether the flaw is exploitable for code execution.","how_to_check":"- Run `firefox --version` (or check Help > About) and compare against `159` and ESR `115.44` and `153.6`\n- Check whether browsers are managed centrally with an update policy","needs_analyst":true,"not_affected_if":["already-on-fixed-version"],"who_is_affected":"Anyone running a Firefox build older than the fixed versions is exposed, since the flaw is in the browser's image handling, which runs when a page or file is rendered. Teams that only run managed, auto-updated desktops with current Firefox or ESR builds can confirm they are already patched. The sources do not say which earlier versions are affected.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"unknown"},"cost_usd":0.00059,"input_tokens":3254,"output_tokens":529,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-117908':15A,18A '-2026':14A,17A '115.44':80C '153.6':84C '159':77C 'attack':10A,52B 'beyond':54B 'browser':19B 'bug':29B 'code':12A 'compon':35B,70C 'corrupt':37B 'craft':41B 'cve':13A,16A 'desktop':20B 'esr':21B,79C,83C 'exact':58B 'firefox':1A,22B,31B,76C,78C,82C 'fix':74C 'free':5A,28B,65C 'gain':53B 'graphic':33B,68C 'imag':7A,42B 'imagelib':34B,69C 'impact':59B 'let':9A 'librari':8A 'memori':38B 'process':44B 'run':11A 'runtim':23B 'say':49B 'sourc':46B 'unconfirm':61B 'use':3A,26B,63C 'use-after-fre':2A,25B,62C 'vulner':72C","nicknames":[],"mitigations":[],"who_affected":"Anyone running a Firefox build older than the fixed versions is exposed, since the flaw is in the browser's image handling, which runs when a page or file is rendered. Teams that only run managed, auto-updated desktops with current Firefox or ESR builds can confirm they are already patched. The sources do not say which earlier versions are affected.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T14:16:46+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-117908","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-117908","severity":null,"published_at":"2026-10-27T14:16:46+00:00","modified_at":"2026-10-27T14:16:46+00:00","first_seen_at":"2026-10-27T14:32:22+00:00","fetched_at":"2026-10-27T14:32:22+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"}