{"id":"CVE-2026-118358","kind":"vulnerability","aliases":["CVE-2026-118358"],"related":[],"title":"Chrome: WebAudio memory corruption lets a crafted page run code in sandbox","description":"Memory corruption in WebAudio in Google Chrome prior to 156.0.8078.73 allowed a remote attacker to potentially execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)","summary":"A memory corruption bug in the WebAudio component of Google Chrome before 156.0.8078.73 can be triggered by a crafted HTML page. An attacker who lures a user to that page can execute arbitrary code inside the browser sandbox.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","chromium","desktop","endpoints","other"],"not_affected_if":["already-updated-to-156.0.8078.73"],"how_to_check":"- Run `chrome://version` in Chrome and compare the version with `156.0.8078.73`\n- Check Chromium-based browsers and embedded Chromium builds the same way, since they ship their own version numbers","fix":"- Update Google Chrome to `156.0.8078.73` or later\n- Update other Chromium-based browsers and embedded Chromium builds to the vendor release that includes this fix","status":"open","published_at":"2026-10-27T23:17:05+00:00","first_seen_at":"2026-10-27T23:29:44+00:00","triaged_at":"2026-10-27T23:31:26+00:00","updated_at":"2026-10-27T23:31:26+00:00","category":"other","confidence":0.7,"triage":{"at":"2026-10-27T23:31:26Z","model":"claude-haiku-5-5","output":{"fix":"- Update Google Chrome to `156.0.8078.73` or later\n- Update other Chromium-based browsers and embedded Chromium builds to the vendor release that includes this fix","reach":"internet","title":"Chrome: WebAudio memory corruption lets a crafted page run code in sandbox","impact":"high","summary":"A memory corruption bug in the WebAudio component of Google Chrome before 156.0.8078.73 can be triggered by a crafted HTML page. An attacker who lures a user to that page can execute arbitrary code inside the browser sandbox.","category":"other","nicknames":[],"who_cares":["chrome","chromium","browsers","desktop","endpoints"],"confidence":0.7,"needs_auth":"no","worst_case":"Arbitrary code runs inside the Chrome sandbox on the victim's machine","analyst_note":"Sources give no exploitation status or patch-diff detail; check the Chrome Releases blog and Chromium bug tracker for the fixed WebAudio issue and sandbox-escape status.","how_to_check":"- Run `chrome://version` in Chrome and compare the version with `156.0.8078.73`\n- Check Chromium-based browsers and embedded Chromium builds the same way, since they ship their own version numbers","needs_analyst":true,"not_affected_if":["already-updated-to-156.0.8078.73"],"who_is_affected":"Any user or machine running Google Chrome older than 156.0.8078.73 is exposed, and so is any app that embeds Chromium with an older build. Exposure requires a victim to open an attacker-controlled HTML page. Managed fleets that auto-update Chrome are likely already patched, and the sources do not say whether any server-side workload is affected.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000645,"input_tokens":3299,"output_tokens":631,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-118358':15A,18A '-2026':14A,17A '156.0.8078.73':36B,71C 'allow':72C 'arbitrari':56B,79C 'attack':46B,75C 'browser':19B,60B 'bug':27B 'chrome':1A,20B,34B,68C 'chromium':21B,89C 'code':10A,57B,80C 'compon':31B 'corrupt':4A,26B,63C 'craft':7A,42B,86C 'cve':13A,16A 'desktop':22B 'endpoint':23B 'execut':55B,78C 'googl':33B,67C 'high':92C 'html':43B,87C 'insid':58B,81C 'let':5A 'lure':48B 'memori':3A,25B,62C 'page':8A,44B,53B,88C 'potenti':77C 'prior':69C 'remot':74C 'run':9A 'sandbox':12A,61B,83C 'secur':90C 'sever':91C 'trigger':39B 'user':50B 'via':84C 'webaudio':2A,30B,65C","nicknames":[],"mitigations":[],"who_affected":"Any user or machine running Google Chrome older than 156.0.8078.73 is exposed, and so is any app that embeds Chromium with an older build. Exposure requires a victim to open an attacker-controlled HTML page. Managed fleets that auto-update Chrome are likely already patched, and the sources do not say whether any server-side workload is affected.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T23:17:05+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-118358","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118358","severity":null,"published_at":"2026-10-27T23:17:05+00:00","modified_at":"2026-10-27T23:17:05+00:00","first_seen_at":"2026-10-27T23:29:44+00:00","fetched_at":"2026-10-27T23:29:44+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"}