{"id":"CVE-2026-113054","kind":"vulnerability","aliases":["CVE-2026-113054"],"related":[],"title":"Google Chrome: out-of-bounds read in SiteIsolation leaks sandbox memory","description":"Out of bounds read in SiteIsolation 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: Medium)","summary":"A flaw in Chrome's SiteIsolation component lets a crafted HTML page read memory inside the browser sandbox. An attacker who lures a user to the page can read data the renderer should not see.","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":["browser","chrome","endpoints","package"],"not_affected_if":["chrome-156.0.8078.47-or-later"],"how_to_check":"- Open chrome://version and compare the version against `156.0.8078.47`\n- On Linux or macOS run `google-chrome --version` or `chromium --version`","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":"2026-10-20T22:18:56+00:00","first_seen_at":"2026-10-23T21:57:23+00:00","triaged_at":"2026-10-25T03:53:20+00:00","updated_at":"2026-10-25T03:53:20+00:00","category":"package","confidence":0.7,"triage":{"at":"2026-10-25T03:53:20Z","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 SiteIsolation leaks sandbox memory","impact":"medium","summary":"A flaw in Chrome's SiteIsolation component lets a crafted HTML page read memory inside the browser sandbox. An attacker who lures a user to the page can read data the renderer should not see.","category":"package","nicknames":[],"who_cares":["chrome","browser","endpoints"],"confidence":0.7,"needs_auth":"no","worst_case":"Attacker reads sandboxed browser memory after a victim visits a page","analyst_note":"","how_to_check":"- Open chrome://version and compare the version against `156.0.8078.47`\n- On Linux or macOS run `google-chrome --version` or `chromium --version`","needs_analyst":false,"not_affected_if":["chrome-156.0.8078.47-or-later"],"who_is_affected":"Any machine running Google Chrome before `156.0.8078.47` is affected, since exploitation only needs a visit to a crafted page. Managed fleets that already pin a newer Chrome build can skip it.","user_interaction":"yes","needs_special_setup":"no","severity_if_unknown":"medium"},"cost_usd":0.000568,"input_tokens":3339,"output_tokens":469,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-113054':15A,18A '-2026':14A,17A '156.0.8078.47':71C 'allow':72C 'attack':44B,75C 'bound':6A,62C 'browser':21B,41B 'chrome':2A,20A,22B,28B,68C 'chromium':87C 'compon':31B 'craft':34B,84C 'cve':13A,16A 'data':54B 'endpoint':23B 'flaw':26B 'googl':1A,67C 'google':19A 'html':35B,85C 'insid':39B,79C 'leak':10A 'let':32B 'lure':46B 'medium':90C 'memori':12A,38B,78C 'out-of-bound':3A 'packag':24B 'page':36B,51B,86C 'prior':69C 'read':7A,37B,53B,63C,77C 'remot':74C 'render':56B 'sandbox':11A,42B,81C 'secur':88C 'see':59B 'sever':89C 'siteisol':9A,30B,65C 'user':48B 'via':82C","nicknames":[],"mitigations":[],"who_affected":"Any machine running Google Chrome before `156.0.8078.47` is affected, since exploitation only needs a visit to a crafted page. Managed fleets that already pin a newer Chrome build can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:18:56+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-2026-113054","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-113054","severity":null,"published_at":"2026-10-20T22:18:56+00:00","modified_at":"2026-10-22T15:39:25+00:00","first_seen_at":"2026-10-23T21:57:23+00:00","fetched_at":"2026-10-23T22:28:59+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"}