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ChromeWeb browser · Google

CVE-2019-5855

MEDIUM · 6.5 CVSS v3.1 Published 2019-11-25
Fix available
A fix is available. Upgrade to 76.0.3809.87 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
Integer overflow in PDFium in Google Chrome prior to 76.0.3809.87 allowed a remote attacker to potentially exploit heap corruption via a crafted PDF file.

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 confidence

Integer overflow in PDFium (Google Chrome's PDF rendering engine) allows a remote attacker to corrupt heap memory by tricking a user into opening a specially crafted PDF file, potentially leading to arbitrary code execution.

MitigationUpdate Google Chrome to version 76.0.3809.87 or later to patch the vulnerable PDFium component.

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:< 76.0.3809.87

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
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

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. Determine installed Google Chrome version
    Navigate to chrome://settings/help in the Chrome browser, or click Chrome menu > Help > About Google Chrome, or run 'google-chrome --version' in a terminal
    Affected if The version displayed is before 76.0.3809.87 (e.g., 75.0.x.x or earlier)
  2. Confirm PDFium is accessible
    PDFium is the built-in PDF rendering engine in Chrome and cannot be disabled as a separate component - it activates whenever a PDF file is opened in the browser
    Affected if PDF files can be opened in Chrome (the default behavior), which means PDFium is active and the integer overflow flaw can be triggered

You are affected if your Chrome version is earlier than 76.0.3809.87 and users in your environment open PDF files, as the vulnerable PDFium component is always present and enabled by default.

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 76.0.3809.87 or later
Fixed in 76.0.3809.87
Interim mitigation

Update Google Chrome to version 76.0.3809.87 or later to patch the vulnerable PDFium component.

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-2019-5855 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