{"id":"CVE-2026-117905","kind":"vulnerability","aliases":["CVE-2026-117905"],"related":[],"title":"Firefox: use-after-free in audio and video playback component","description":"Use-after-free in the Audio/Video: Playback 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 Audio/Video Playback component can corrupt memory when media is handled. The sources do not say what an attacker gains beyond memory corruption, such as code execution.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","desktop","firefox","runtime"],"not_affected_if":["fixed-version"],"how_to_check":"- Check the installed Firefox version in Help > About Firefox, or run `firefox --version`\n- Confirm whether the Firefox ESR line in use is 115 or 153","fix":"- Update Firefox to `159` or later\n- Update Firefox ESR 115 to `115.44` or later\n- Update Firefox ESR 153 to `153.6` or later","status":"open","published_at":"2026-10-27T14:16:45+00:00","first_seen_at":"2026-10-27T14:32:22+00:00","triaged_at":"2026-10-27T14:37:33+00:00","updated_at":"2026-10-27T14:37:33+00:00","category":"runtime","confidence":0.4,"triage":{"at":"2026-10-27T14:37:33Z","model":"claude-haiku-5-5","output":{"fix":"- Update Firefox to `159` or later\n- Update Firefox ESR 115 to `115.44` or later\n- Update Firefox ESR 153 to `153.6` or later","reach":"internet","title":"Firefox: use-after-free in audio and video playback component","impact":"medium","summary":"A use-after-free bug in Firefox's Audio/Video Playback component can corrupt memory when media is handled. The sources do not say what an attacker gains beyond memory corruption, such as code execution.","category":"runtime","nicknames":[],"who_cares":["firefox","desktop","browsers"],"confidence":0.4,"needs_auth":"unknown","worst_case":"unknown; memory corruption in the browser, code execution not confirmed","analyst_note":"Check the Mozilla security advisory for this CVE for exploitability, trigger conditions and whether code execution is shown.","how_to_check":"- Check the installed Firefox version in Help > About Firefox, or run `firefox --version`\n- Confirm whether the Firefox ESR line in use is 115 or 153","needs_analyst":true,"not_affected_if":["fixed-version"],"who_is_affected":"Anyone running Firefox or Firefox ESR builds older than the fixed versions, including managed desktop fleets. The sources do not say whether specific media content or settings are required to trigger it, so unknown. Systems on the fixed versions are not affected.","user_interaction":"unknown","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000587,"input_tokens":3254,"output_tokens":524,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-117905':14A,17A '-2026':13A,16A '115.44':75C '153.6':79C '159':72C 'attack':48B 'audio':7A 'audio/video':31B,63C 'beyond':50B 'browser':18B 'bug':27B 'code':55B 'compon':11A,33B,65C 'corrupt':35B,52B 'cve':12A,15A 'desktop':19B 'esr':74C,78C 'execut':56B 'firefox':1A,20B,29B,71C,73C,77C 'fix':69C 'free':5A,26B,60C 'gain':49B 'handl':40B 'media':38B 'memori':36B,51B 'playback':10A,32B,64C 'runtim':21B 'say':45B 'sourc':42B 'use':3A,24B,58C 'use-after-fre':2A,23B,57C 'video':9A 'vulner':67C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Firefox or Firefox ESR builds older than the fixed versions, including managed desktop fleets. The sources do not say whether specific media content or settings are required to trigger it, so unknown. Systems on the fixed versions are not affected.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T14:16:45+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-117905","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-117905","severity":null,"published_at":"2026-10-27T14:16:45+00:00","modified_at":"2026-10-27T14:16:45+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"}