{"id":"CVE-2026-11645","kind":"vulnerability","aliases":["CVE-2026-11645"],"related":[],"title":"Out of bounds read and write in V8 in Google Chrome prior to 149.0.7827.103 allowed a remote attacker to execute…","description":"Google Chromium V8 out-of-bounds read and write vulnerability that could allow a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.\n\nCISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","summary":"A out-of-bounds read and write bug in the V8 JavaScript engine used by Chromium browsers lets a remote attacker run code inside the browser sandbox by serving a crafted HTML page. CISA lists it as actively exploited.","severity":"high","cvss":8.8,"epss":null,"exploited":true,"exploited_at":"2026-06-09T00:00:00+00:00","products":[{"name":"Google Chromium V8","fixed":[],"affected":"","ecosystem":"vendor"},{"name":"google chrome","fixed":["149.0.7827.103"],"affected":"< 149.0.7827.103","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["browser-users","chromium","exploited","google-chrome","managed-browsers","microsoft-edge","opera","other"],"not_affected_if":["browser-already-updated","non-chromium-browser"],"how_to_check":"Open the browser's version page (chrome://version or edge://version) and compare it to the fixed version in the vendor advisory; unknown whether the sources name a fixed version.","fix":"Update Google Chrome, Microsoft Edge, Opera and other Chromium-based browsers to the latest release that includes the vendor fix; unknown which version contains it.","status":"open","published_at":"2026-06-09T00:00:00+00:00","first_seen_at":"2026-10-23T19:11:51+00:00","triaged_at":"2026-10-23T20:33:55+00:00","updated_at":"2026-10-23T23:44:51+00:00","category":"other","confidence":0.7,"triage":{"at":"2026-10-23T20:33:55Z","model":"claude-haiku-5-5","output":{"fix":"Update Google Chrome, Microsoft Edge, Opera and other Chromium-based browsers to the latest release that includes the vendor fix; unknown which version contains it.","summary":"A out-of-bounds read and write bug in the V8 JavaScript engine used by Chromium browsers lets a remote attacker run code inside the browser sandbox by serving a crafted HTML page. CISA lists it as actively exploited.","category":"other","who_cares":["chromium","google-chrome","microsoft-edge","opera","browser-users","managed-browsers"],"confidence":0.7,"analyst_note":"Find the fixed Chromium version and the Chrome Releases advisory for CVE-2026-11645 and add it to fix; the sources give no version or patch link.","how_to_check":"Open the browser's version page (chrome://version or edge://version) and compare it to the fixed version in the vendor advisory; unknown whether the sources name a fixed version.","needs_analyst":true,"not_affected_if":["non-chromium-browser","browser-already-updated"],"severity_if_unknown":"high"},"cost_usd":0.0004,"input_tokens":2131,"output_tokens":374,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-01':149C '-11645':23A,26A '-2026':22A,25A '149.0.7827.103':14A '22':148C 'action':139C 'activ':85B 'affect':119C 'allow':15A,100C 'appli':140C 'applic':146C 'arbitrari':106C 'attack':18A,68B,103C 'bod':147C 'bound':3A,51B,93C 'browser':33B,42B,64B,73B,122C 'browser-us':32B 'bug':55B 'chrome':11A,31A,39B,132C 'chromium':28A,35B,63B,88C,125C 'cisa':81B,137C 'cloud':152C 'code':70B,107C 'could':99C,118C 'craft':78B,113C 'cve':21A,24A 'discontinu':155C 'edg':45B,134C 'engin':60B 'execut':20A,105C 'exploit':36B,86B 'follow':145C 'googl':10A,38B,87C,131C 'google':27A,30A 'google-chrom':37B 'guidanc':150C 'html':79B,114C 'includ':126C 'insid':71B,108C 'instruct':144C 'javascript':59B 'let':65B 'limit':129C 'list':82B 'manag':41B 'managed-brows':40B 'microsoft':44B,133C 'microsoft-edg':43B 'mitig':141C,161C 'multipl':120C 'opera':46B,136C 'out-of-bound':48B,90C 'page':80B,115C 'per':142C 'prior':12A 'product':159C 'read':4A,52B,94C 'remot':17A,67B,102C 'requir':138C 'run':69B 'sandbox':74B,110C 'serv':76B 'servic':153C 'unavail':163C 'use':61B,156C 'user':34B 'util':124C 'v8':8A,29A,58B,89C 'vendor':143C 'via':111C 'vulner':97C,117C 'web':121C 'write':6A,54B,96C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2026-06-09T00:00:00+00:00","kev":{"dateAdded":"2026-06-09","dueDate":"2026-06-23","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cvss_by":"134c704f-9b21-4f2e-91b3-4a467353bcc0","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2026-11645","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-11645","severity":null,"published_at":"2026-06-09T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:51+00:00","fetched_at":"2026-10-25T12:39:21+00:00","note":null},{"source":"nvd","external_id":"CVE-2026-11645","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-11645","severity":null,"published_at":"2026-06-09T00:16:47+00:00","modified_at":"2026-07-23T08:10:00+00:00","first_seen_at":"2026-10-23T23:44:51+00:00","fetched_at":"2026-10-23T23:44:51+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"}