---
id: "CVE-2026-121194"
kind: "vulnerability"
aliases: ["CVE-2026-121194"]
title: "Chrome: a compromised renderer can read data via crafted PDF"
severity: "medium"
cvss: null
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["browser", "chrome", "desktop", "managed-fleets", "other"]
not_affected_if: ["chrome-updated", "other-browser-only"]
published_at: "2026-11-03T21:17:28+00:00"
first_seen_at: "2026-11-03T21:19:25+00:00"
updated_at: "2026-11-03T21:22:57+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121194", "first_seen_at": "2026-11-03T21:19:25+00:00"}]
---

# Chrome: a compromised renderer can read data via crafted PDF

Google Chrome's Site Isolation component is missing an authorization check, so a remote attacker who has already compromised the renderer process can read sensitive information through a crafted PDF file. Chromium rates it Medium severity.

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

## How to check

- Check the installed Chrome version at `chrome://settings/help` or run `google-chrome --version` on Linux; versions before `157.0.8103.38` are listed as affected.
- Check managed fleets for Chrome builds older than `157.0.8103.38`.

## Fix

- Google Chrome: move to `157.0.8103.38` or later.

## Timeline

- 2026-11-03T21:19:25+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121194

## From the sources

Missing authorization in SiteIsolation in Google Chrome prior to 157.0.8103.38 allowed a remote attacker who had compromised the renderer process to obtain sensitive information via a crafted PDF file. (Chromium security severity: Medium)

---

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