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SafariWeb browser · Apple

CVE-2010-0052

HIGH · 9.3 CVSS v2.0 Published 2010-03-15
Fix available
A fix is available. Upgrade to after 4.0.4 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click Patch available

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
Use-after-free vulnerability in WebKit in Apple Safari before 4.0.5 allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via vectors related to "callbacks for HTML elements."

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
How this class of weakness works · CWE-399

A legacy NVD category grouping weaknesses in how resources — memory, file handles, connections — are allocated, used, and released. It gathers leaks, exhaustion, and lifecycle bugs under one label rather than naming a single flaw. The fix depends on the specific resource issue, generally pairing acquisition with release and bounding what any request can consume.

General guidance for the resource management errors class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

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
SafariWeb browser
Affected:<= 4.0.4= 4.0= 4.0.0b= 4.0.1= 4.0.2= 4.0.3

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
M
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete

AV:N/AC:M/Au:N/C:C/I:C/A:C

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.

dbcve · scoped
Upgrade available Upgrade to a release after 4.0.4
Vendor patch www.securityfocus.com →
Recommended fix High confidence

Safari 4.0.5 or later (note: Safari 4.x is obsolete; consider upgrading to a supported modern Safari version)

  1. 1. Check current Safari version by going to Safari > About Safari
  2. 2. If running Safari version 4.0.4 or earlier, upgrade to Safari 4.0.5 or later
  3. 3. Download the latest compatible Safari version from Apple's official website or via Software Update
  4. 4. Install the update and restart the browser
  5. 5. Verify the version has been updated to 4.0.5 or newer
Caveat Safari 4.x is extremely outdated (2010). Upgrading to modern Safari is strongly recommended for security, but may require OS compatibility considerations as newer Safari versions require more recent macOS versions.

Generated from the published advisory — verify against the referenced sources before acting.

We can identify the exact fixed release, upgrade, and verify it in staging — typical engagement from $1,950. Get the upgrade done

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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-2010-0052 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