---
id: "CVE-2025-6554"
kind: "vulnerability"
aliases: ["CVE-2025-6554"]
title: "Type confusion in V8 in Google Chrome prior to 138.0.7204.96 allowed a remote attacker to perform arbitrary\u2026"
severity: "high"
cvss: 8.1
epss: null
exploited: true
status: "open"
category: "runtime"
products: [{"name": "Google Chromium V8", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "google chrome", "fixed": ["138.0.7204.96"], "affected": "< 138.0.7204.96", "ecosystem": "vendor"}, {"name": "google chrome", "fixed": ["138.0.7204.92"], "affected": "< 138.0.7204.92", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["browser-users", "chrome", "chromium", "edge", "exploited", "opera", "runtime"]
not_affected_if: ["already-patched-browser"]
published_at: "2025-06-30T22:15:29+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-23T22:29:05+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2025-6554", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-6554", "first_seen_at": "2026-10-23T22:29:05+00:00"}]
---

# Type confusion in V8 in Google Chrome prior to 138.0.7204.96 allowed a remote attacker to perform arbitrary…

Chromium's V8 JavaScript engine has a type confusion bug that lets a remote attacker read and write arbitrary memory by serving a crafted HTML page. CISA lists it 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 < 138.0.7204.96 fixed 138.0.7204.96
- vendor:google chrome affected < 138.0.7204.92 fixed 138.0.7204.92

## How to check

Open chrome://version (or edge://version, opera://version) and compare the version against the vendor fix; unknown for the exact fixed build in the sources.

## Fix

Update Google Chrome, Microsoft Edge, Opera or other Chromium browsers to the vendor's patched release; unknown for the exact build number in the sources.

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2025-6554
- 2026-10-23T22:29:05+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2025-6554

## From the sources

Google Chromium V8 contains a type confusion vulnerability that could allow a remote attacker to perform arbitrary read/write 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 mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

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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_