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ChromeWeb browser · Google

CVE-2015-1304

HIGH · 7.5 CVSS v2.0 Published 2015-10-12
Fix available
A fix is available. Upgrade to after 45.0.2454.93 or later.
See remediation →
84/100
Remediation priority · High
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
object-observe.js in Google V8, as used in Google Chrome before 45.0.2454.101, does not properly restrict method calls on access-checked objects, which allows remote attackers to bypass the Same Origin Policy via a (1) observe or (2) getNotifier call.

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 object-observe.js component in Google V8 JavaScript engine (used in Chrome prior to 45.0.2454.101) fails to properly enforce access restrictions on access-checked objects, allowing the Object.observe() and getNotifier() methods to be invoked on objects that should be protected. This enables a Same Origin Policy bypass where malicious web content could access data from other origins.

MitigationUpgrade Google Chrome to version 45.0.2454.101 or later to patch the vulnerable V8 engine. Organizations should also ensure browser update policies are enforced enterprise-wide.

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:<= 45.0.2454.93

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
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial

AV:N/AC:L/Au:N/C:P/I:P/A:P

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 installed Chrome version
    Open Chrome and navigate to chrome://version, or click Help > About Google Chrome to view the version number displayed
    Affected if The version shown is 45.0.2454.93 or earlier (any version <= 45.0.2454.93)
  2. Confirm Chrome update status
    Navigate to chrome://settings/help to see if Chrome is up to date and view the current version
    Affected if The installed version is not 45.0.2454.101 or later

If the installed Chrome version is 45.0.2454.93 or earlier, the browser is vulnerable to the Same Origin Policy bypass via V8's Object.observe() and getNotifier() methods.

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 45.0.2454.93
Interim mitigation

Upgrade Google Chrome to version 45.0.2454.101 or later to patch the vulnerable V8 engine. Organizations should also ensure browser update policies are enforced enterprise-wide.

Fix this in Chrome Scoped from the published advisory
  • Consultation1.0 h
  • Implementation1.0 h
  • Testing2.0 h
  • Review / QA1.0 h
5.0 hours of engineering $860
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,376.

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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-2015-1304 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