{"id":"CVE-2026-121231","kind":"vulnerability","aliases":["CVE-2026-121231"],"related":[],"title":"Chrome: DevTools authorization flaw lets a crafted web page bypass access restrictions","description":"Incorrect authorization in DevTools in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to bypass system access restrictions via a crafted HTML page. (Chromium security severity: Medium)","summary":"Google Chrome's DevTools component had an incorrect authorization check, letting a remote attacker bypass system access restrictions through a crafted HTML page. Chromium rates it Medium severity.","severity":"medium","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browser","chrome","desktop","runtime"],"not_affected_if":["chrome-updated"],"how_to_check":"- Check the installed Chrome version in chrome://settings/help and compare it to `157.0.8103.38`","fix":"- Google Chrome: move to `157.0.8103.38` or later","status":"open","published_at":"2026-11-03T21:17:33+00:00","first_seen_at":"2026-11-03T21:19:28+00:00","triaged_at":"2026-11-03T21:21:19+00:00","updated_at":"2026-11-03T21:21:19+00:00","category":"runtime","confidence":0.6,"triage":{"at":"2026-11-03T21:21:19Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.38` or later","reach":"internet","title":"Chrome: DevTools authorization flaw lets a crafted web page bypass access restrictions","impact":"medium","summary":"Google Chrome's DevTools component had an incorrect authorization check, letting a remote attacker bypass system access restrictions through a crafted HTML page. Chromium rates it Medium severity.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["chrome","desktop","browser"],"confidence":0.6,"fix_status":"available","needs_auth":"no","worst_case":"A crafted web page bypasses system access restrictions in Chrome.","analyst_note":"","how_to_check":"- Check the installed Chrome version in chrome://settings/help and compare it to `157.0.8103.38`\n- unknown","plain_action":"Update Google Chrome to version 157.0.8103.38 or later: open the menu, choose Help, then About Google Chrome.","needs_analyst":false,"not_affected_if":["chrome-updated"],"who_is_affected":"Anyone running Google Chrome before 157.0.8103.38 who visits a page an attacker controls. The sources do not describe a specific configuration that is required.","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000647,"input_tokens":4102,"output_tokens":474,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121231':15A,18A '-2026':14A,17A '157.0.8103.38':60C 'access':11A,39B,68C 'allow':61C 'attack':36B,64C 'author':3A,31B,52C 'browser':19B 'bypass':10A,37B,66C 'check':32B 'chrome':1A,20B,24B,57C 'chromium':46B,75C 'compon':27B 'craft':7A,43B,72C 'cve':13A,16A 'desktop':21B 'devtool':2A,26B,54C 'flaw':4A 'googl':23B,56C 'html':44B,73C 'incorrect':30B,51C 'let':5A,33B 'medium':49B,78C 'page':9A,45B,74C 'prior':58C 'rate':47B 'remot':35B,63C 'restrict':12A,40B,69C 'runtim':22B 'secur':76C 'sever':50B,77C 'system':38B,67C 'via':70C 'web':8A","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome before 157.0.8103.38 who visits a page an attacker controls. The sources do not describe a specific configuration that is required.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"everyone","plain_action":"Update Google Chrome to version 157.0.8103.38 or later: open the menu, choose Help, then About Google Chrome.","pkeys":[],"ptokens":[],"labels":["browser","chrome","desktop","medium","runtime"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:33+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121231","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121231","severity":null,"published_at":"2026-11-03T21:17:33+00:00","modified_at":"2026-11-03T21:17:33+00:00","first_seen_at":"2026-11-03T21:19:28+00:00","fetched_at":"2026-11-03T21:19:28+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"}