ChromeWeb browser · Google
CVE-2018-18350
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 · uneditedIncorrect handling of CSP enforcement during navigations in Blink in Google Chrome prior to 71.0.3578.80 allowed a remote attacker to bypass content security policy 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 · high confidenceA Content Security Policy bypass vulnerability in Blink (Chrome's rendering engine) where CSP was not properly enforced during certain navigation events, allowing a crafted HTML page to bypass security restrictions.
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
< 71.0.3578.80
Enterprise Linux DesktopOperating system
= 6.0
Enterprise Linux ServerOperating system
= 6.0
Enterprise Linux WorkstationOperating system
= 6.0
Debian LinuxOperating system
= 9.0CVSS 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
- None
- Integrity
- High
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/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 checksWork through these to decide whether this CVE applies to you.
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Determine installed Google Chrome versionOpen Chrome, click the three-dot menu > Help > About Google Chrome, or run 'google-chrome --version' or 'chrome --version' in terminalAffected if The displayed version number is less than 71.0.3578.80
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Check Chromium-based browser versionsIf using a Chromium-based browser (e.g., Opera, Edge), check its version in the same manner - About menu or command line - and verify if it shares the same Blink engine versionAffected if The browser uses a Blink engine version derived from Chrome prior to 71.0.3578.80 and displays a version less than 71.0.3578.80
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Compare against affected version rangeDocument the exact version number found and compare it numerically against the threshold 71.0.3578.80Affected if The installed version string, when parsed as a semantic version, is less than 71.0.3578.80 (e.g., 70.0.3588.99 would be affected)
A user is affected if their Google Chrome or Chromium-based browser version is below 71.0.3578.80, as the CSP bypass exists in the Blink rendering engine for those versions.
Generated from the published advisory. Verify against your own configuration.
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 data71.0.3578.80
Upgrade Google Chrome to version 71.0.3578.80 or later to receive the patch; no application-level code changes required as this is a browser engine vulnerability.
Fix this in Chrome
Scoped from the published advisory
- Consultation1.0 h
- Testing1.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,200.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-18350 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2018-18350 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
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