{"id":"CVE-2026-121080","kind":"vulnerability","aliases":["CVE-2026-121080"],"related":[],"title":"Chrome: codec use-after-free lets a crafted web page read sandbox memory","description":"Use after free in Codecs in Google Chrome prior to 157.0.8103.38 allowed a remote attacker to read memory inside the sandbox via a crafted HTML page. (Chromium security severity: High)","summary":"A use-after-free bug in Chrome's Codecs component lets a remote attacker read memory inside the browser sandbox when a victim opens a crafted HTML page. Chromium rates it High severity.","severity":"high","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["browsers","chrome","chromium","desktop","runtime"],"not_affected_if":["auto-update-enabled","chrome-updated"],"how_to_check":"- Open Chrome and check the version under Help > About Google Chrome, or run `chrome://version` in the address bar.\n- Compare the installed version against `157.0.8103.38`.","fix":"- Google Chrome: move to `157.0.8103.38` or later.","status":"open","published_at":"2026-11-03T21:17:13+00:00","first_seen_at":"2026-11-03T21:19:12+00:00","triaged_at":"2026-11-03T21:26:49+00:00","updated_at":"2026-11-03T21:26:49+00:00","category":"runtime","confidence":0.7,"triage":{"at":"2026-11-03T21:26:49Z","model":"claude-haiku-5-5","output":{"fix":"- Google Chrome: move to `157.0.8103.38` or later.","reach":"internet","title":"Chrome: codec use-after-free lets a crafted web page read sandbox memory","impact":"medium","summary":"A use-after-free bug in Chrome's Codecs component lets a remote attacker read memory inside the browser sandbox when a victim opens a crafted HTML page. Chromium rates it High severity.","audience":"everyone","category":"runtime","nicknames":[],"who_cares":["chrome","browsers","desktop","chromium"],"confidence":0.7,"fix_status":"available","needs_auth":"no","worst_case":"Attacker reads memory inside the browser sandbox from a crafted page","analyst_note":"","how_to_check":"- Open Chrome and check the version under Help > About Google Chrome, or run `chrome://version` in the address bar.\n- Compare the installed version against `157.0.8103.38`.","plain_action":"Update Google Chrome to version 157.0.8103.38 or later: Chrome menu > Help > About Google Chrome.","needs_analyst":false,"not_affected_if":["chrome-updated","auto-update-enabled"],"who_is_affected":"Anyone running Google Chrome older than 157.0.8103.38 who visits a page that an attacker controls or has tampered with. Managed fleets that pin Chrome versions are exposed until they move forward. Users on Chromium-based browsers should check their vendor's build, since the Chromium fix may land separately.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000686,"input_tokens":4096,"output_tokens":553,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-121080':17A,20A '-2026':16A,19A '157.0.8103.38':70C 'allow':71C 'attack':40B,74C 'browser':21B,45B 'bug':31B 'chrome':1A,22B,33B,67C 'chromium':23B,55B,86C 'codec':2A,35B,64C 'compon':36B 'craft':9A,52B,83C 'cve':15A,18A 'desktop':24B 'free':6A,30B,62C 'googl':66C 'high':58B,89C 'html':53B,84C 'insid':43B,78C 'let':7A,37B 'memori':14A,42B,77C 'open':50B 'page':11A,54B,85C 'prior':68C 'rate':56B 'read':12A,41B,76C 'remot':39B,73C 'runtim':25B 'sandbox':13A,46B,80C 'secur':87C 'sever':59B,88C 'use':4A,28B,60C 'use-after-fre':3A,27B 'via':81C 'victim':49B 'web':10A","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome older than 157.0.8103.38 who visits a page that an attacker controls or has tampered with. Managed fleets that pin Chrome versions are exposed until they move forward. Users on Chromium-based browsers should check their vendor's build, since the Chromium fix may land separately.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"everyone","plain_action":"Update Google Chrome to version 157.0.8103.38 or later: Chrome menu > Help > About Google Chrome.","pkeys":[],"ptokens":[],"labels":["browsers","chrome","chromium","desktop","high","runtime"],"campaign_type":null,"first_public_at":"2026-11-03T21:17:13+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-121080","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-121080","severity":null,"published_at":"2026-11-03T21:17:13+00:00","modified_at":"2026-11-03T21:17:13+00:00","first_seen_at":"2026-11-03T21:19:12+00:00","fetched_at":"2026-11-03T21:19:12+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"}