CVE-2021-38016

Severity: high (CVSS 8.8 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: 2021-12-23 · updated 2026-06-17
Weakness: CWE-863

Description

Insufficient policy enforcement in background fetch in Google Chrome prior to 96.0.4664.45 allowed a remote attacker to bypass same origin policy via a crafted HTML page.

Affected products

Debian Linux: 10.0, 11.0
Fedoraproject Fedora: 34
Google Chrome: before 96.0.4664.45 — fixed in 96.0.4664.45

How to fix

Upgrade to a fixed version: Google Chrome 96.0.4664.45. Check the vendor advisory for mitigations.

References

https://chromereleases.googleblog.com/2021/11/stable-channel-update-for-desktop.html
https://crbug.com/1244289
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3W46HRT2UVHWSLZB6JZHQF6JNQWKV744/
https://www.debian.org/security/2022/dsa-5046
https://chromereleases.googleblog.com/2021/11/stable-channel-update-for-desktop.html
https://crbug.com/1244289
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3W46HRT2UVHWSLZB6JZHQF6JNQWKV744/
https://www.debian.org/security/2022/dsa-5046

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