{"id":"CVE-2026-118312","kind":"vulnerability","aliases":["CVE-2026-118312"],"related":[],"title":"Chrome: memory corruption in Paint lets crafted page run code","description":"Memory corruption in Paint in Google Chrome prior to 156.0.8078.73 allowed a remote attacker to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Medium)","summary":"A memory corruption flaw in the Paint component of Google Chrome before 156.0.8078.73 can be triggered by a crafted HTML page. Chromium rates it Medium, and the description says a remote attacker could potentially execute arbitrary code outside the sandbox.","severity":"medium","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","desktop-fleet","runtime"],"not_affected_if":["chrome-156.0.8078.73-or-later"],"how_to_check":"- Check the installed Chrome version in the browser's About page or with `google-chrome --version`\n- Compare it against the fixed version `156.0.8078.73`","fix":"- Update Google Chrome to `156.0.8078.73` or later\n- Restart the browser after updating so the fix takes effect","status":"open","published_at":"2026-10-27T23:16:59+00:00","first_seen_at":"2026-10-27T23:29:43+00:00","triaged_at":"2026-10-27T23:32:07+00:00","updated_at":"2026-10-27T23:32:07+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-10-27T23:32:07Z","model":"claude-haiku-5-5","output":{"fix":"- Update Google Chrome to `156.0.8078.73` or later\n- Restart the browser after updating so the fix takes effect","reach":"internet","title":"Chrome: memory corruption in Paint lets crafted page run code","impact":"high","summary":"A memory corruption flaw in the Paint component of Google Chrome before 156.0.8078.73 can be triggered by a crafted HTML page. Chromium rates it Medium, and the description says a remote attacker could potentially execute arbitrary code outside the sandbox.","category":"runtime","nicknames":[],"who_cares":["chrome","browsers","desktop-fleet"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker may run arbitrary code outside the browser sandbox","analyst_note":"Check the Chrome release notes and the Chromium bug tracker entry for CVE-2026-118312 to confirm exploitation status and whether other Chromium browsers are affected.","how_to_check":"- Check the installed Chrome version in the browser's About page or with `google-chrome --version`\n- Compare it against the fixed version `156.0.8078.73`","needs_analyst":true,"not_affected_if":["chrome-156.0.8078.73-or-later"],"who_is_affected":"Anyone running Google Chrome before 156.0.8078.73 who browses untrusted web pages is potentially exposed, since the trigger is a crafted HTML page. Managed fleets and users who browse only trusted internal sites face less exposure but should still update. Chromium-based browsers that pick up the same Paint code may also be affected, but the sources do not say which.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.000626,"input_tokens":3299,"output_tokens":593,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-118312':13A,16A '-2026':12A,15A '156.0.8078.73':35B,72C 'allow':73C 'arbitrari':58B,80C 'attack':54B,76C 'browser':17B 'chrome':1A,18B,33B,69C 'chromium':44B,90C 'code':10A,59B,81C 'compon':30B 'corrupt':3A,25B,64C 'could':55B 'craft':7A,41B,87C 'cve':11A,14A 'descript':50B 'desktop':20B 'desktop-fleet':19B 'execut':57B,79C 'flaw':26B 'fleet':21B 'googl':32B,68C 'html':42B,88C 'let':6A 'medium':47B,93C 'memori':2A,24B,63C 'outsid':60B,82C 'page':8A,43B,89C 'paint':5A,29B,66C 'potenti':56B,78C 'prior':70C 'rate':45B 'remot':53B,75C 'run':9A 'runtim':22B 'sandbox':62B,84C 'say':51B 'secur':91C 'sever':92C 'trigger':38B 'via':85C","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome before 156.0.8078.73 who browses untrusted web pages is potentially exposed, since the trigger is a crafted HTML page. Managed fleets and users who browse only trusted internal sites face less exposure but should still update. Chromium-based browsers that pick up the same Paint code may also be affected, but the sources do not say which.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T23:16:59+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-118312","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118312","severity":null,"published_at":"2026-10-27T23:16:59+00:00","modified_at":"2026-10-27T23:16:59+00:00","first_seen_at":"2026-10-27T23:29:43+00:00","fetched_at":"2026-10-27T23:29:43+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"}