---
id: "CVE-2026-121133"
kind: "vulnerability"
aliases: ["CVE-2026-121133"]
title: "Chrome on Mac: image handling flaw lets a compromised renderer escape sandbox"
severity: "high"
cvss: null
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["browser", "chrome", "macos", "runtime"]
not_affected_if: ["chrome-updated", "non-mac-platforms"]
published_at: "2026-11-03T21:17:21+00:00"
first_seen_at: "2026-11-03T21:19:21+00:00"
updated_at: "2026-11-03T21:24:47+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121133", "first_seen_at": "2026-11-03T21:19:21+00:00"}]
---

# Chrome on Mac: image handling flaw lets a compromised renderer escape sandbox

Google Chrome on Mac prior to 157.0.8103.38 has an incorrect reference resolution bug in its Images component. A remote attacker who has already compromised the renderer process can run arbitrary code outside the sandbox using crafted network traffic.

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

## How to check

- Check the installed Chrome version in Chrome's About page (Chrome menu > Help > About Google Chrome) and compare it to `157.0.8103.38`.

## Fix

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

## Timeline

- 2026-11-03T21:19:21+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121133

## From the sources

Incorrect reference resolution in Images in Google Chrome on on Mac prior to 157.0.8103.38 allowed a remote attacker who had compromised the renderer process to execute arbitrary code outside the sandbox via crafted network traffic. (Chromium security severity: High)

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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_