---
id: "CVE-2018-17480"
kind: "vulnerability"
aliases: ["CVE-2018-17480"]
title: "Execution of user supplied Javascript during array deserialization leading to an out of bounds write in V8 in Google\u2026"
severity: "high"
cvss: 8.8
epss: 0.3564
exploited: true
status: "open"
category: "runtime"
products: [{"name": "Google Chromium V8", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "google chrome", "fixed": ["71.0.3578.80"], "affected": "< 71.0.3578.80", "ecosystem": "vendor"}, {"name": "redhat enterprise linux desktop", "fixed": [], "affected": "= 6.0", "ecosystem": "vendor"}, {"name": "redhat enterprise linux server", "fixed": [], "affected": "= 6.0", "ecosystem": "vendor"}, {"name": "redhat enterprise linux workstation", "fixed": [], "affected": "= 6.0", "ecosystem": "vendor"}, {"name": "debian linux", "fixed": [], "affected": "= 9.0", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["browsers", "chrome", "chromium", "edge", "exploited", "opera", "runtime"]
not_affected_if: ["fixed-browser-version"]
published_at: "2018-12-11T16:29:00+00:00"
first_seen_at: "2026-10-23T19:11:52+00:00"
updated_at: "2026-10-23T22:29:04+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2018-17480", "first_seen_at": "2026-10-23T19:11:52+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2018-17480", "first_seen_at": "2026-10-23T19:13:45+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-17480", "first_seen_at": "2026-10-23T22:29:04+00:00"}]
---

# Execution of user supplied Javascript during array deserialization leading to an out of bounds write in V8 in Google…

An out-of-bounds write in the Chromium V8 JavaScript engine lets a remote attacker run code inside the browser sandbox by getting a victim to open a crafted HTML page. It is listed as actively exploited in the wild.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Google Chromium V8 affected ? fixed ?
- vendor:google chrome affected < 71.0.3578.80 fixed 71.0.3578.80
- vendor:redhat enterprise linux desktop affected = 6.0 fixed ?
- vendor:redhat enterprise linux server affected = 6.0 fixed ?
- vendor:redhat enterprise linux workstation affected = 6.0 fixed ?
- vendor:debian linux affected = 9.0 fixed ?

## How to check

Open the browser's version page (chrome://version or edge://version) and compare against the fixed release in the vendor advisory.

## Fix

Update Chrome, Edge, Opera or other Chromium-based browsers to a release that includes the vendor's fix for this CVE, per CISA's required action.

## Timeline

- 2026-10-23T19:11:52+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2018-17480
- 2026-10-23T19:13:45+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2018-17480
- 2026-10-23T22:29:04+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2018-17480

## From the sources

Google Chromium V8 Engine contains out-of-bounds write vulnerability that allows a remote attacker to execute 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.

CISA required action: Apply updates per vendor instructions.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_