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ChromeWeb browser · Google

CVE-2018-6093

MEDIUM · 6.5 CVSS v3.0 Published 2019-01-09
Fix available
A fix is available. Upgrade to 66.0.3359.117 or later.
See remediation →
72/100
Remediation priority · Elevated
Remotely reachable No privileges

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Insufficient origin checks in Blink in Google Chrome prior to 66.0.3359.117 allowed a remote attacker to leak cross-origin data via a crafted HTML page.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

Insufficient origin checks in Blink (Chrome's rendering engine) prior to version 66.0.3359.117 allowed a remote attacker to leak cross-origin data via a crafted HTML page, violating the same-origin policy and enabling unauthorized access to sensitive information from other domains.

MitigationUpdate Google Chrome to version 66.0.3359.117 or later to patch the insufficient origin check vulnerability in Blink.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
ChromeWeb browser
Affected:< 66.0.3359.117
Debian LinuxOperating system
Affected:= 8.0= 9.0
Enterprise Linux DesktopOperating system
Affected:= 6.0
Enterprise Linux ServerOperating system
Affected:= 6.0
Enterprise Linux WorkstationOperating system
Affected:= 6.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Check Google Chrome browser version
    Open chrome://version in the Chrome address bar and look at the 'Chrome' line showing the version number
    Affected if The displayed version number is less than 66.0.3359.117 (for example, 66.0.3359.100 or earlier)
  2. Check Chrome version via command line on Linux
    Run 'google-chrome --version' or 'chromium --version' in a terminal
    Affected if The reported version is less than 66.0.3359.117
  3. Check Chrome package on Debian-based systems
    Run 'dpkg -l | grep google-chrome' or 'apt-cache policy google-chrome-stable'
    Affected if The installed package version shown is less than 66.0.3359.117
  4. Check Chrome RPM on Red Hat systems
    Run 'rpm -qa | grep -i chrome' or 'rpm -qi google-chrome-stable'
    Affected if The installed RPM version is less than 66.0.3359.117

You are affected if Google Chrome (or Chromium) is installed and its version is lower than 66.0.3359.117, as this version range contains the vulnerable Blink origin check flaw.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Upgrade available Upgrade to 66.0.3359.117 or later
Fixed in 66.0.3359.117
Interim mitigation

Update Google Chrome to version 66.0.3359.117 or later to patch the insufficient origin check vulnerability in Blink.

Fix this in Chrome Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing2.0 h
  • Review / QA1.0 h
9.0 hours of engineering $1,600
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,560.

Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2018-6093 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data