{"id":"CVE-2019-5786","kind":"vulnerability","aliases":["CVE-2019-5786"],"related":[],"title":"Google Chrome Blink: Google Chrome Blink Use-After-Free Vulnerability","description":"Google Chrome Blink contains a heap use-after-free vulnerability that allows an attacker to potentially perform out of bounds memory access via a crafted HTML page.\n\nCISA required action: Apply updates per vendor instructions.","summary":"Google Chrome's Blink rendering engine has a heap use-after-free bug that can be triggered by a crafted HTML page. An attacker can use it to access memory out of bounds, which can lead to code execution in the browser.","severity":"high","cvss":6.5,"epss":0.61085,"exploited":true,"exploited_at":"2022-05-23T00:00:00+00:00","products":[{"name":"Google Chrome Blink","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["browser","chrome","endpoints","exploited","runtime","web-users"],"not_affected_if":["chrome-already-updated"],"how_to_check":"Open chrome://version and confirm the Chrome version is at or above the release that fixed CVE-2019-5786 (fix version unknown from sources).\nOn managed fleets, query the installed Chrome version from your endpoint management tool.","fix":"Update Google Chrome to the latest stable release, per vendor instructions in the CISA catalog entry.\nFixed version number: unknown from sources.","status":"open","published_at":"2019-06-27T17:15:13+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:15:59+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"runtime","confidence":0.7,"triage":{"at":"2026-10-23T21:15:59Z","model":"claude-haiku-5-5","output":{"fix":"Update Google Chrome to the latest stable release, per vendor instructions in the CISA catalog entry.\nFixed version number: unknown from sources.","reach":"internet","impact":"high","summary":"Google Chrome's Blink rendering engine has a heap use-after-free bug that can be triggered by a crafted HTML page. An attacker can use it to access memory out of bounds, which can lead to code execution in the browser.","category":"runtime","who_cares":["chrome","browser","endpoints","web-users"],"confidence":0.7,"needs_auth":"no","worst_case":"Attacker runs code in the browser after a victim opens a crafted page","analyst_note":"Confirm the first fixed Chrome version from the Chrome Releases blog or NVD entry for CVE-2019-5786 so how_to_check has a concrete version.","how_to_check":"Open chrome://version and confirm the Chrome version is at or above the release that fixed CVE-2019-5786 (fix version unknown from sources).\nOn managed fleets, query the installed Chrome version from your endpoint management tool.","needs_analyst":true,"not_affected_if":["chrome-already-updated"],"user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"high"},"cost_usd":0.000501,"input_tokens":2835,"output_tokens":436,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2019':13A,16A '-5786':14A,17A 'access':58B,94C 'action':102C 'allow':84C 'appli':103C 'attack':53B,86C 'blink':3A,6A,20A,32B,74C 'bound':62B,92C 'browser':21B,71B 'bug':42B 'chrome':2A,5A,19A,22B,30B,73C 'cisa':100C 'code':67B 'contain':75C 'craft':49B,97C 'cve':12A,15A 'endpoint':23B 'engin':34B 'execut':68B 'exploit':24B 'free':10A,41B,81C 'googl':1A,4A,29B,72C 'google':18A 'heap':37B,77C 'html':50B,98C 'instruct':107C 'lead':65B 'memori':59B,93C 'page':51B,99C 'per':105C 'perform':89C 'potenti':88C 'render':33B 'requir':101C 'runtim':25B 'trigger':46B 'updat':104C 'use':8A,39B,55B,79C 'use-after-fre':7A,38B,78C 'user':28B 'vendor':106C 'via':95C 'vulner':11A,82C 'web':27B 'web-us':26B","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2019-06-27T17:15:13+00:00","kev":{"dateAdded":"2022-05-23","dueDate":"2022-06-13","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2019-5786","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2019-5786","severity":null,"published_at":"2022-05-23T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T11:39:16+00:00","note":null},{"source":"epss","external_id":"CVE-2019-5786","url":"https://api.first.org/data/v1/epss?cve=CVE-2019-5786","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:45+00:00","fetched_at":"2026-10-23T19:13:45+00:00","note":null},{"source":"nvd","external_id":"CVE-2019-5786","url":"https://nvd.nist.gov/vuln/detail/CVE-2019-5786","severity":null,"published_at":"2019-06-27T17:15:13+00:00","modified_at":"2026-06-17T02:38:12+00:00","first_seen_at":"2026-10-23T21:57:35+00:00","fetched_at":"2026-10-23T21:57:35+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"}