{"id":"CVE-2026-118335","kind":"vulnerability","aliases":["CVE-2026-118335"],"related":[],"title":"Chrome on Mac: crafted HTML page can run code inside sandbox","description":"Improper input validation in Metrics in Google Chrome on on Mac 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":"Improper input validation in Chrome's Metrics component on macOS lets a remote attacker run code inside the browser sandbox via a crafted HTML page. The sources say the Chromium security severity is High and do not describe a sandbox escape.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","chrome","desktop","macos","other"],"not_affected_if":["chrome-156.0.8078.73-or-later"],"how_to_check":"- Run `chrome://version` in Chrome on Mac and compare the version with the fixed release, `156.0.8078.73`\n- Check the installed app version with `/usr/libexec/PlistBuddy -c \"Print :CFBundleShortVersionString\" \"/Applications/Google Chrome.app/Contents/Info.plist\"`","fix":"- Update Google Chrome on Mac to `156.0.8078.73` or later\n- Relaunch the browser after the update so the fixed build is running","status":"open","published_at":"2026-10-27T23:17:01+00:00","first_seen_at":"2026-10-27T23:29:43+00:00","triaged_at":"2026-10-27T23:31:47+00:00","updated_at":"2026-10-27T23:31:47+00:00","category":"other","confidence":0.6,"triage":{"at":"2026-10-27T23:31:47Z","model":"claude-haiku-5-5","output":{"fix":"- Update Google Chrome on Mac to `156.0.8078.73` or later\n- Relaunch the browser after the update so the fixed build is running","reach":"internet","title":"Chrome on Mac: crafted HTML page can run code inside sandbox","impact":"medium","summary":"Improper input validation in Chrome's Metrics component on macOS lets a remote attacker run code inside the browser sandbox via a crafted HTML page. The sources say the Chromium security severity is High and do not describe a sandbox escape.","category":"other","nicknames":[],"who_cares":["chrome","macos","browser","desktop"],"confidence":0.6,"needs_auth":"no","worst_case":"Attacker runs code inside the browser sandbox after a user visits a page","analyst_note":"Confirm the sandbox-only scope and any exploited-in-the-wild status against the Chrome Releases blog and the Chromium issue tracker; the NVD entry gives no CVSS score.","how_to_check":"- Run `chrome://version` in Chrome on Mac and compare the version with the fixed release, `156.0.8078.73`\n- Check the installed app version with `/usr/libexec/PlistBuddy -c \"Print :CFBundleShortVersionString\" \"/Applications/Google Chrome.app/Contents/Info.plist\"`","needs_analyst":true,"not_affected_if":["chrome-156.0.8078.73-or-later"],"who_is_affected":"Any Mac with Google Chrome older than `156.0.8078.73` is exposed when a user visits a crafted HTML page. Managed fleets that pin Chrome versions or delay updates are most at risk. Systems on other platforms are not covered by this entry.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000643,"input_tokens":3304,"output_tokens":625,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-118335':14A,17A '-2026':13A,16A '156.0.8078.73':76C 'allow':77C 'arbitrari':84C 'attack':35B,80C 'browser':18B,40B 'chrome':1A,19B,26B,70C 'chromium':51B,94C 'code':9A,37B,85C 'compon':29B 'craft':4A,44B,91C 'cve':12A,15A 'describ':59B 'desktop':20B 'escap':62B 'execut':83C 'googl':69C 'high':55B,97C 'html':5A,45B,92C 'improp':22B,63C 'input':23B,64C 'insid':10A,38B,86C 'let':32B 'mac':3A,73C 'maco':21B,31B 'metric':28B,67C 'page':6A,46B,93C 'potenti':82C 'prior':74C 'remot':34B,79C 'run':8A,36B 'sandbox':11A,41B,61B,88C 'say':49B 'secur':52B,95C 'sever':53B,96C 'sourc':48B 'valid':24B,65C 'via':42B,89C","nicknames":[],"mitigations":[],"who_affected":"Any Mac with Google Chrome older than `156.0.8078.73` is exposed when a user visits a crafted HTML page. Managed fleets that pin Chrome versions or delay updates are most at risk. Systems on other platforms are not covered by this entry.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T23:17:01+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-118335","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118335","severity":null,"published_at":"2026-10-27T23:17:01+00:00","modified_at":"2026-10-27T23:17:01+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"}