What’s Vulnerable › Vulnerabilities

CVE-2021-21164

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-03-09 · updated 2026-06-17
• Weakness: CWE-346

Description

Insufficient data validation in Chrome on iOS in Google Chrome on iOS prior to 89.0.4389.72 allowed a remote attacker to leak cross-origin data via a crafted HTML page.

Affected products

• Debian Linux: 10.0
• Fedoraproject Fedora: 32, 33, 34
• Google Chrome: before 89.0.4389.72 — fixed in 89.0.4389.72

How to fix

Upgrade to a fixed version: Google Chrome 89.0.4389.72. Check the vendor advisory for mitigations.

References

• https://chromereleases.googleblog.com/2021/03/stable-channel-update-for-desktop.html
• https://crbug.com/1164846
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BBT54RKAE5XLMWSHLVUKJ7T2XHHYMXLH/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FE5SIKEVYTMDCC5OSXGOM2KRPYLHYMQX/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LCIDZ77XUDMB2EBPPWCQXPEIJERDNSNT/
• https://chromereleases.googleblog.com/2021/03/stable-channel-update-for-desktop.html
• https://crbug.com/1164846
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BBT54RKAE5XLMWSHLVUKJ7T2XHHYMXLH/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FE5SIKEVYTMDCC5OSXGOM2KRPYLHYMQX/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LCIDZ77XUDMB2EBPPWCQXPEIJERDNSNT/

Get alerted when CVE-2021-21164 or the next vulnerability affects your stack