{"id":"CVE-2026-118339","kind":"vulnerability","aliases":["CVE-2026-118339"],"related":[],"title":"Chrome: use-after-free in Animation lets a crafted page run code","description":"Use after free in Animation 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 Animation component of Google Chrome before 156.0.8078.73 can be triggered by a crafted HTML page. A remote attacker who gets a user to load 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","endpoints","other","web"],"not_affected_if":["already-on-156.0.8078.73-or-later"],"how_to_check":"- Run `chrome://version` in Chrome and compare the version with `156.0.8078.73`\n- On managed fleets, check the Chrome version reported by your device management console","fix":"- Update Google Chrome to `156.0.8078.73` or later\n- Relaunch the browser after the update so the new version takes effect","status":"open","published_at":"2026-10-27T23:17:02+00:00","first_seen_at":"2026-10-27T23:29:43+00:00","triaged_at":"2026-10-27T23:31:43+00:00","updated_at":"2026-10-27T23:31:43+00:00","category":"other","confidence":0.75,"triage":{"at":"2026-10-27T23:31:43Z","model":"claude-haiku-5-5","output":{"fix":"- Update Google Chrome to `156.0.8078.73` or later\n- Relaunch the browser after the update so the new version takes effect","reach":"internet","title":"Chrome: use-after-free in Animation lets a crafted page run code","impact":"high","summary":"A use-after-free bug in the Animation component of Google Chrome before 156.0.8078.73 can be triggered by a crafted HTML page. A remote attacker who gets a user to load that page can execute arbitrary code inside the browser sandbox.","category":"other","nicknames":[],"who_cares":["chrome","browsers","endpoints","web"],"confidence":0.75,"needs_auth":"no","worst_case":"Attacker runs code inside the browser sandbox after a victim visits a page","analyst_note":"Check the Chrome release notes and the Chromium bug tracker for the exploited-in-the-wild status and whether a sandbox escape is chained; the NVD entry gives no further detail.","how_to_check":"- Run `chrome://version` in Chrome and compare the version with `156.0.8078.73`\n- On managed fleets, check the Chrome version reported by your device management console","needs_analyst":true,"not_affected_if":["already-on-156.0.8078.73-or-later"],"who_is_affected":"Any device running Google Chrome older than 156.0.8078.73 is exposed, because the flaw is reached by simply loading a crafted web page. Exposure does not depend on configuration or account state, so every browsing user on an affected build should update. Chromium-based browsers that pick up the same fix are a separate update path and are not covered by this source.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000621,"input_tokens":3292,"output_tokens":584,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-118339':16A,19A '-2026':15A,18A '156.0.8078.73':39B,77C 'allow':78C 'anim':7A,33B,71C 'arbitrari':61B,84C 'attack':50B,81C 'browser':20B,65B 'bug':30B 'chrome':1A,21B,37B,74C 'chromium':94C 'code':13A,62B,85C 'compon':34B 'craft':10A,45B,91C 'cve':14A,17A 'endpoint':22B 'execut':60B,83C 'free':5A,29B,69C 'get':52B 'googl':36B,73C 'high':97C 'html':46B,92C 'insid':63B,86C 'let':8A 'load':56B 'page':11A,47B,58B,93C 'prior':75C 'remot':49B,80C 'run':12A 'sandbox':66B,88C 'secur':95C 'sever':96C 'trigger':42B 'use':3A,27B,67C 'use-after-fre':2A,26B 'user':54B 'via':89C 'web':24B","nicknames":[],"mitigations":[],"who_affected":"Any device running Google Chrome older than 156.0.8078.73 is exposed, because the flaw is reached by simply loading a crafted web page. Exposure does not depend on configuration or account state, so every browsing user on an affected build should update. Chromium-based browsers that pick up the same fix are a separate update path and are not covered by this source.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T23:17:02+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-118339","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-118339","severity":null,"published_at":"2026-10-27T23:17:02+00:00","modified_at":"2026-10-27T23:17:02+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"}