CVE-2025-43464
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 · uneditedA denial-of-service issue was addressed with improved input validation. This issue is fixed in macOS Tahoe 26.1. Visiting a website may lead to an app denial-of-service.
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 · moderate confidenceA denial-of-service vulnerability in macOS allows a malicious website to crash or hang an application through improper input validation. The vulnerability is triggered when a user visits a specially crafted website, causing the target application to become unresponsive or terminate.
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< 26.1CVSS 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 checksWork through these to decide whether this CVE applies to you.
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Check installed macOS versionGo to Apple menu > About This Mac or run 'sw_vers' in TerminalAffected if Version is earlier than 26.1 (any build before macOS Tahoe 26.1)
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Identify browsers with JavaScript enabledCheck browser settings in Safari, Chrome, Firefox, or other installed browsers - JavaScript is typically enabled by default in most browsersAffected if Any browser with JavaScript enabled is installed and active
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Determine if browsers are used for web browsingReview installed browsers and their frequency of use - this vulnerability affects any browser visiting untrusted sitesAffected if Users browse the web with any browser on the system
The system is affected if macOS version is below 26.1 and browsers with JavaScript support are used to visit websites
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.
dbcve · scoped26.1
Update to macOS Tahoe 26.1 or later. As a defense-in-depth measure, disable JavaScript in browsers or use content-blocking extensions when visiting untrusted websites.
macOS Tahoe 26.1
- Back up your Mac using Time Machine or another backup method before updating
- Ensure your Mac is connected to power during the update process
- Open System Settings (or System Preferences on older macOS versions)
- Click on "Software Update" in the sidebar
- Wait for macOS to check for available updates
- If macOS Tahoe 26.1 is available, click "Update Now" or "Upgrade Now"
- Follow the on-screen instructions to download and install the update
- Restart your Mac when prompted to complete the installation
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,176.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-43464 — 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-2025-43464 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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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.
- 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