{"id":"CVE-2026-113309","kind":"vulnerability","aliases":["CVE-2026-113309"],"related":[],"title":"Google Chrome: out-of-bounds read in Media lets a crafted page read sandbox memory","description":"Out of bounds read in Media in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to read memory inside the sandbox via a crafted HTML page. (Chromium security severity: High)","summary":"A bug in Chrome's Media component lets a remote attacker read memory inside the browser sandbox when a victim opens a crafted HTML page. The sources say the read is limited to sandbox memory, so it is an information-disclosure step rather than direct code execution.","severity":"medium","cvss":6.5,"epss":null,"exploited":false,"exploited_at":null,"products":[{"name":"google chrome","fixed":["156.0.8078.47"],"affected":"< 156.0.8078.47","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["browsers","chrome","desktop","managed-endpoints","other"],"not_affected_if":["already-on-156.0.8078.47-or-later"],"how_to_check":"- Run `chrome://version` in Chrome and compare the version to `156.0.8078.47`.\n- On managed fleets, query the installed Chrome version with your device management tool and flag anything below `156.0.8078.47`.","fix":"- Update Google Chrome to `156.0.8078.47` or later.\n- Relaunch the browser after the update so the fixed build is running.","status":"open","published_at":"2026-10-20T22:19:25+00:00","first_seen_at":"2026-10-23T21:57:24+00:00","triaged_at":"2026-10-25T03:52:54+00:00","updated_at":"2026-10-25T03:52:54+00:00","category":"other","confidence":0.7,"triage":{"at":"2026-10-25T03:52:54Z","model":"claude-haiku-5-5","output":{"fix":"- Update Google Chrome to `156.0.8078.47` or later.\n- Relaunch the browser after the update so the fixed build is running.","reach":"internet","title":"Google Chrome: out-of-bounds read in Media lets a crafted page read sandbox memory","impact":"low","summary":"A bug in Chrome's Media component lets a remote attacker read memory inside the browser sandbox when a victim opens a crafted HTML page. The sources say the read is limited to sandbox memory, so it is an information-disclosure step rather than direct code execution.","category":"other","nicknames":[],"who_cares":["chrome","browsers","desktop","managed-endpoints"],"confidence":0.7,"needs_auth":"no","worst_case":"Attacker reads memory inside the browser sandbox via a crafted page","analyst_note":"","how_to_check":"- Run `chrome://version` in Chrome and compare the version to `156.0.8078.47`.\n- On managed fleets, query the installed Chrome version with your device management tool and flag anything below `156.0.8078.47`.","needs_analyst":false,"not_affected_if":["already-on-156.0.8078.47-or-later"],"who_is_affected":"Anyone running Google Chrome before `156.0.8078.47` who browses the web on the affected machine is exposed, since the trigger is a crafted HTML page the user visits. Servers and automated systems that do not run Chrome as a browser for users can skip it, and so can teams where every device is already on the fixed build.","user_interaction":"yes","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000611,"input_tokens":3329,"output_tokens":556,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-113309':19A,22A '-2026':18A,21A '156.0.8078.47':90C 'allow':91C 'attack':41B,94C 'bound':6A,81C 'browser':25B,46B 'bug':32B 'chrome':2A,24A,26B,34B,87C 'chromium':106C 'code':77B 'compon':37B 'craft':12A,53B,103C 'cve':17A,20A 'desktop':27B 'direct':76B 'disclosur':72B 'endpoint':30B 'execut':78B 'googl':1A,86C 'google':23A 'high':109C 'html':54B,104C 'inform':71B 'information-disclosur':70B 'insid':44B,98C 'let':10A,38B 'limit':62B 'manag':29B 'managed-endpoint':28B 'media':9A,36B,84C 'memori':16A,43B,65B,97C 'open':51B 'out-of-bound':3A 'page':13A,55B,105C 'prior':88C 'rather':74B 'read':7A,14A,42B,60B,82C,96C 'remot':40B,93C 'sandbox':15A,47B,64B,100C 'say':58B 'secur':107C 'sever':108C 'sourc':57B 'step':73B 'via':101C 'victim':50B","nicknames":[],"mitigations":[],"who_affected":"Anyone running Google Chrome before `156.0.8078.47` who browses the web on the affected machine is exposed, since the trigger is a crafted HTML page the user visits. Servers and automated systems that do not run Chrome as a browser for users can skip it, and so can teams where every device is already on the fixed build.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:19:25+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","cvss_by":"134c704f-9b21-4f2e-91b3-4a467353bcc0","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-113309","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-113309","severity":null,"published_at":"2026-10-20T22:19:25+00:00","modified_at":"2026-10-21T17:05:43+00:00","first_seen_at":"2026-10-23T21:57:24+00:00","fetched_at":"2026-10-23T22:29:00+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"}