{"id":"CVE-2026-118356","kind":"vulnerability","aliases":["CVE-2026-118356"],"related":[],"title":"Chrome: use-after-free in WTF lets a crafted page run code","description":"Use after free in WTF in Google Chrome prior to 156.0.8078.73 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)","summary":"A use-after-free bug in the WTF library of Google Chrome before 156.0.8078.73 lets a remote attacker run arbitrary code inside the browser sandbox. The attack works through a crafted HTML page that a user opens.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","endpoints","other"],"not_affected_if":["chrome-updated"],"how_to_check":"- Open chrome://settings/help in Chrome and read the installed version\n- Check that the version is at least `156.0.8078.73`","fix":"- Update Google Chrome to `156.0.8078.73` or later\n- Relaunch the browser after the update to load the fixed build","status":"open","published_at":"2026-10-27T23:17:04+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":0.6,"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- Relaunch the browser after the update to load the fixed build","reach":"internet","title":"Chrome: use-after-free in WTF lets a crafted page run code","impact":"high","summary":"A use-after-free bug in the WTF library of Google Chrome before 156.0.8078.73 lets a remote attacker run arbitrary code inside the browser sandbox. The attack works through a crafted HTML page that a user opens.","category":"other","nicknames":[],"who_cares":["chrome","browsers","endpoints"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker runs code inside the browser sandbox after a user visits a page","analyst_note":"","how_to_check":"- Open chrome://settings/help in Chrome and read the installed version\n- Check that the version is at least `156.0.8078.73`","needs_analyst":false,"not_affected_if":["chrome-updated"],"who_is_affected":"Anyone running Google Chrome older than 156.0.8078.73 is exposed, since the bug triggers when the browser renders a malicious page. Chromium-based browsers that pull in the same engine may also need their own updates. Teams that manage browsers on laptops or in VDI should check every installed copy.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.00057,"input_tokens":3293,"output_tokens":481,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-118356':16A,19A '-2026':15A,18A '156.0.8078.73':37B,71C 'allow':72C 'arbitrari':43B,78C 'attack':41B,50B,75C 'browser':20B,47B 'bug':28B 'chrome':1A,21B,35B,68C 'chromium':88C 'code':13A,44B,79C 'craft':10A,54B,85C 'cve':14A,17A 'endpoint':22B 'execut':77C 'free':5A,27B,63C 'googl':34B,67C 'high':91C 'html':55B,86C 'insid':45B,80C 'let':8A,38B 'librari':32B 'open':60B 'page':11A,56B,87C 'prior':69C 'remot':40B,74C 'run':12A,42B 'sandbox':48B,82C 'secur':89C 'sever':90C 'use':3A,25B,61C 'use-after-fre':2A,24B 'user':59B 'via':83C 'work':51B 'wtf':7A,31B,65C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome older than 156.0.8078.73 is exposed, since the bug triggers when the browser renders a malicious page. Chromium-based browsers that pull in the same engine may also need their own updates. Teams that manage browsers on laptops or in VDI should check every installed copy.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T23:17:04+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-118356","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118356","severity":null,"published_at":"2026-10-27T23:17:04+00:00","modified_at":"2026-10-27T23:17:04+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"}