{"id":"CVE-2026-121125","kind":"vulnerability","aliases":["CVE-2026-121125"],"related":[],"title":"Chrome: ServiceWorker flaw leaks data to an attacker who already controls the renderer","description":"Information leak in ServiceWorker in Google Chrome prior to 157.0.8103.38 allowed a remote attacker who had compromised the renderer process to obtain sensitive information via a crafted HTML page. (Chromium security severity: Low)","summary":"Google Chrome versions before 157.0.8103.38 have an information leak in ServiceWorker. A remote attacker who had already compromised the renderer process can read sensitive information through a crafted HTML page.","severity":"low","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","endpoints","other"],"not_affected_if":["chrome-at-or-above-157.0.8103.38"],"how_to_check":"- Check the installed Chrome version in Chrome's About page or with `google-chrome --version` on Linux\n- Compare the result against `157.0.8103.38`","fix":"- Google Chrome: update to `157.0.8103.38` or later","status":"open","published_at":"2026-11-03T21:17:20+00:00","first_seen_at":"2026-11-03T21:19:19+00:00","triaged_at":"2026-11-03T21:24:55+00:00","updated_at":"2026-11-03T21:24:55+00:00","category":"other","confidence":0.6,"triage":{"at":"2026-11-03T21:24:55Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: update to `157.0.8103.38` or later","reach":"internet","title":"Chrome: ServiceWorker flaw leaks data to an attacker who already controls the renderer","impact":"low","summary":"Google Chrome versions before 157.0.8103.38 have an information leak in ServiceWorker. A remote attacker who had already compromised the renderer process can read sensitive information through a crafted HTML page.","audience":"everyone","category":"other","nicknames":[],"who_cares":["chrome","browsers","endpoints"],"confidence":0.6,"fix_status":"available","needs_auth":"no","worst_case":"Sensitive information leaks after the renderer is already compromised.","analyst_note":"","how_to_check":"- Check the installed Chrome version in Chrome's About page or with `google-chrome --version` on Linux\n- Compare the result against `157.0.8103.38`","plain_action":"Update Google Chrome to version 157.0.8103.38 or later.","needs_analyst":false,"not_affected_if":["chrome-at-or-above-157.0.8103.38"],"who_is_affected":"Any device running Google Chrome before 157.0.8103.38 is in scope. The attacker must first compromise the renderer process, so this is a chained flaw rather than a standalone takeover. Teams that manage browsers on company machines should check their fleet versions.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"low"},"cost_usd":0.000666,"input_tokens":4106,"output_tokens":510,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121125':16A,19A '-2026':15A,18A '157.0.8103.38':27B,62C 'allow':63C 'alreadi':10A,39B 'attack':8A,36B,66C 'browser':20B 'chrome':1A,21B,24B,59C 'chromium':82C 'compromis':40B,69C 'control':11A 'craft':50B,79C 'cve':14A,17A 'data':5A 'endpoint':22B 'flaw':3A 'googl':23B,58C 'html':51B,80C 'inform':30B,47B,53C,76C 'leak':4A,31B,54C 'low':85C 'obtain':74C 'page':52B,81C 'prior':60C 'process':43B,72C 'read':45B 'remot':35B,65C 'render':13A,42B,71C 'secur':83C 'sensit':46B,75C 'servicework':2A,33B,56C 'sever':84C 'version':25B 'via':77C","nicknames":[],"mitigations":[],"who_affected":"Any device running Google Chrome before 157.0.8103.38 is in scope. The attacker must first compromise the renderer process, so this is a chained flaw rather than a standalone takeover. Teams that manage browsers on company machines should check their fleet versions.","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.","pkeys":[],"ptokens":[],"labels":["browsers","chrome","endpoints","low","other"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:20+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121125","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121125","severity":null,"published_at":"2026-11-03T21:17:20+00:00","modified_at":"2026-11-03T21:17:20+00:00","first_seen_at":"2026-11-03T21:19:19+00:00","fetched_at":"2026-11-03T21:19:19+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"}