What’s Vulnerable › Vulnerabilities

CVE-2021-37965

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-10-08 · updated 2026-06-17

Description

Inappropriate implementation in Background Fetch API in Google Chrome prior to 94.0.4606.54 allowed a remote attacker to leak cross-origin data via a crafted HTML page.

Affected products

• Debian Linux: 10.0, 11.0
• Fedoraproject Fedora: 33, 35
• Google Chrome: before 94.0.4606.54 — fixed in 94.0.4606.54

How to fix

Upgrade to a fixed version: Google Chrome 94.0.4606.54. Check the vendor advisory for mitigations.

References

• https://chromereleases.googleblog.com/2021/09/stable-channel-update-for-desktop_21.html
• https://crbug.com/1239709
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4DDW7HAHTS3SDVXBQUY4SURELO5D4X7R/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PM7MOYYHJSWLIFZ4TPJTD7MSA3HSSLV2/
• https://www.debian.org/security/2022/dsa-5046
• https://chromereleases.googleblog.com/2021/09/stable-channel-update-for-desktop_21.html
• https://crbug.com/1239709
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4DDW7HAHTS3SDVXBQUY4SURELO5D4X7R/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PM7MOYYHJSWLIFZ4TPJTD7MSA3HSSLV2/
• https://www.debian.org/security/2022/dsa-5046

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