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ChromeWeb browser · Google

CVE-2016-2845

MEDIUM · 5.3 CVSS v3.0 Published 2016-03-06
Fix available
A fix is available. Upgrade to after 48.0.2564.116 or later.
See remediation →
62/100
Remediation priority · Elevated
Remotely reachable No privileges Zero-click

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
The Content Security Policy (CSP) implementation in Blink, as used in Google Chrome before 49.0.2623.75, does not ignore a URL's path component in the case of a ServiceWorker fetch, which allows remote attackers to obtain sensitive information about visited web pages by reading CSP violation reports, related to FrameFetchContext.cpp and ResourceFetcher.cpp.

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

The Content Security Policy (CSP) implementation in Blink (Chrome's rendering engine) fails to ignore URL path components during ServiceWorker fetch operations. This causes the full URL path (not just the origin) to be included in CSP violation reports, potentially exposing which specific pages a user visited to attackers who can trigger or intercept these reports.

MitigationUpdate Google Chrome to version 49.0.2623.75 or later. No server-side changes are required as this is a browser vulnerability.

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:<= 48.0.2564.116

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
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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 version
    Open chrome://version in the Chrome address bar or go to Settings > About Chrome to view the installed version number
    Affected if The displayed version is 48.0.2564.116 or earlier (any version <= 48.0.2564.116)
  2. Confirm ServiceWorker usage
    Open Developer Tools (F12), go to the Application tab, and check the Service Workers panel for any registered service workers
    Affected if Any ServiceWorker is registered and handling fetch events in the browser context
  3. Inspect CSP violation report payload
    If you have access to CSP violation reports from your web application, examine the blocked-uri or document-uri fields in the JSON report for full URL paths rather than just origins
    Affected if CSP reports contain full URL paths (including specific page paths) instead of only the origin portion

User is affected if running Google Chrome version 48.0.2564.116 or earlier AND using web applications that register ServiceWorkers with CSP policies that generate violation reports.

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 a release after 48.0.2564.116
Interim mitigation

Update Google Chrome to version 49.0.2623.75 or later. No server-side changes are required as this is a browser vulnerability.

Fix this in Chrome Scoped from the published advisory
  • Consultation1.0 h
  • Testing1.0 h
  • Review / QA1.0 h
3.0 hours of engineering $750
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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-2016-2845 in production — separate from our analysis above.

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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