What’s Vulnerable › Vulnerabilities

CVE-2018-6091

• Severity: medium (CVSS 6.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-01-09 · updated 2026-06-17
• Weakness: CWE-19

Description

Service Workers can intercept any request made by an <embed> or <object> tag in Fetch API in Google Chrome prior to 66.0.3359.117 allowed a remote attacker to leak cross-origin data via a crafted HTML page.

Affected products

• Debian Linux: 8.0, 9.0
• Google Chrome: before 66.0.3359.117 — fixed in 66.0.3359.117
• RedHat Enterprise Linux Desktop: 6.0
• RedHat Enterprise Linux Server: 6.0
• RedHat Enterprise Linux Workstation: 6.0

How to fix

Upgrade to a fixed version: Google Chrome 66.0.3359.117. Check the vendor advisory for mitigations.

References

• http://www.securityfocus.com/bid/103917
• https://access.redhat.com/errata/RHSA-2018:1195
• https://chromereleases.googleblog.com/2018/04/stable-channel-update-for-desktop.html
• https://crbug.com/771933
• https://security.gentoo.org/glsa/201804-22
• https://www.debian.org/security/2018/dsa-4182
• http://www.securityfocus.com/bid/103917
• https://access.redhat.com/errata/RHSA-2018:1195
• https://chromereleases.googleblog.com/2018/04/stable-channel-update-for-desktop.html
• https://crbug.com/771933
• https://security.gentoo.org/glsa/201804-22
• https://www.debian.org/security/2018/dsa-4182

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