{"id":"CVE-2026-118353","kind":"vulnerability","aliases":["CVE-2026-118353"],"related":[],"title":"Chrome: use-after-free in Paint lets a crafted page run code","description":"Use after free in Paint 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 Paint component of Google Chrome before 156.0.8078.73 lets a remote attacker run arbitrary code inside the browser sandbox when the victim opens a crafted HTML page. The sources rate it High in Chromium's severity scale and do not say whether a sandbox escape exists.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","desktop","endpoints","other"],"not_affected_if":["chrome-at-or-above-156.0.8078.73"],"how_to_check":"- Open chrome://version in Chrome and read the version number\n- Run `google-chrome --version` on Linux, or check the Chrome version in the installed app on macOS or Windows\n- Check managed fleets for Chrome builds below `156.0.8078.73`","fix":"- Update Google Chrome to `156.0.8078.73` or later\n- Restart the browser after the update so the new build is running\n- Update Chromium-based browsers (Edge, Brave, Opera) when their vendors ship a build with the Chromium fix","status":"open","published_at":"2026-10-27T23:17:04+00:00","first_seen_at":"2026-10-27T23:29:44+00:00","triaged_at":"2026-10-27T23:31:31+00:00","updated_at":"2026-10-27T23:31:31+00:00","category":"other","confidence":0.7,"triage":{"at":"2026-10-27T23:31:31Z","model":"claude-haiku-5-5","output":{"fix":"- Update Google Chrome to `156.0.8078.73` or later\n- Restart the browser after the update so the new build is running\n- Update Chromium-based browsers (Edge, Brave, Opera) when their vendors ship a build with the Chromium fix","reach":"internet","title":"Chrome: use-after-free in Paint lets a crafted page run code","impact":"high","summary":"A use-after-free bug in the Paint component of Google Chrome before 156.0.8078.73 lets a remote attacker run arbitrary code inside the browser sandbox when the victim opens a crafted HTML page. The sources rate it High in Chromium's severity scale and do not say whether a sandbox escape exists.","category":"other","nicknames":[],"who_cares":["chrome","browsers","desktop","endpoints"],"confidence":0.7,"needs_auth":"no","worst_case":"Attacker runs code inside the browser sandbox after a page visit","analyst_note":"Check the Chrome release notes and the Chromium bug tracker for whether a sandbox escape is chained with this bug and whether it is exploited in the wild.","how_to_check":"- Open chrome://version in Chrome and read the version number\n- Run `google-chrome --version` on Linux, or check the Chrome version in the installed app on macOS or Windows\n- Check managed fleets for Chrome builds below `156.0.8078.73`","needs_analyst":true,"not_affected_if":["chrome-at-or-above-156.0.8078.73"],"who_is_affected":"Any device running Google Chrome older than 156.0.8078.73 is exposed, and the risk comes from browsing to a malicious or compromised page. Managed fleets and shared workstations are the most important to check, since a single visit is enough. Systems that run Chrome only in a locked-down kiosk with no untrusted browsing can wait for the normal update cycle.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000668,"input_tokens":3293,"output_tokens":677,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-118353':16A,19A '-2026':15A,18A '156.0.8078.73':38B,87C 'allow':88C 'arbitrari':44B,94C 'attack':42B,91C 'browser':20B,48B 'bug':29B 'chrome':1A,21B,36B,84C 'chromium':64B,104C 'code':13A,45B,95C 'compon':33B 'craft':10A,55B,101C 'cve':14A,17A 'desktop':22B 'endpoint':23B 'escap':75B 'execut':93C 'exist':76B 'free':5A,28B,79C 'googl':35B,83C 'high':62B,107C 'html':56B,102C 'insid':46B,96C 'let':8A,39B 'open':53B 'page':11A,57B,103C 'paint':7A,32B,81C 'prior':85C 'rate':60B 'remot':41B,90C 'run':12A,43B 'sandbox':49B,74B,98C 'say':71B 'scale':67B 'secur':105C 'sever':66B,106C 'sourc':59B 'use':3A,26B,77C 'use-after-fre':2A,25B 'via':99C 'victim':52B 'whether':72B","nicknames":[],"mitigations":[],"who_affected":"Any device running Google Chrome older than 156.0.8078.73 is exposed, and the risk comes from browsing to a malicious or compromised page. Managed fleets and shared workstations are the most important to check, since a single visit is enough. Systems that run Chrome only in a locked-down kiosk with no untrusted browsing can wait for the normal update cycle.","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-2026-118353","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118353","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"}