---
id: "CVE-2026-118343"
kind: "vulnerability"
aliases: ["CVE-2026-118343"]
title: "Chrome: ReadingList input validation flaw lets a crafted page run code"
severity: "high"
cvss: null
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["browsers", "chrome", "desktop-fleet", "runtime"]
not_affected_if: ["chrome-updated"]
published_at: "2026-10-27T23:17:03+00:00"
first_seen_at: "2026-10-27T23:29:43+00:00"
updated_at: "2026-10-27T23:31:39+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-118343", "first_seen_at": "2026-10-27T23:29:43+00:00"}]
---

# Chrome: ReadingList input validation flaw lets a crafted page run code

Google Chrome before 156.0.8078.73 mishandles input in its ReadingList feature, so a crafted HTML page can potentially execute arbitrary code inside the browser sandbox. Chromium rates it High severity.

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

## How to check

- Check the installed Chrome version in the browser's About page or with `google-chrome --version` on Linux
- Compare the version against `156.0.8078.73`; anything older is affected

## Fix

- Update Google Chrome to `156.0.8078.73` or later
- Relaunch the browser after the update so the new build is active

## Timeline

- 2026-10-27T23:29:43+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-118343

## From the sources

Improper input validation in ReadingList in Google Chrome prior to 156.0.8078.73 allowed a remote attacker to potentially execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: High)

---

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