dbcve.org
SafariWeb browser · Apple

CVE-2026-43699

MEDIUM · 6.5 CVSS v3.1 Published 2026-06-29
Fix available
A fix is available. Upgrade to 26.5.2 or later.
See remediation →
72/100
Remediation priority · Elevated
Remotely reachable No privileges 7 weeks old

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
A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.5.2, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, watchOS 26.6. Processing maliciously crafted web content may lead to an unexpected process crash.

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

A use-after-free vulnerability in WebKit allows processing of maliciously crafted web content to trigger a crash. This memory management issue affects Safari and WebKit-based applications across multiple Apple platforms including iOS, iPadOS, macOS, tvOS, visionOS, and watchOS.

MitigationApply vendor-supplied updates: Safari 26.5.2, iOS/iPadOS 26.5.2, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, and watchOS 26.6. Organizations should prioritize patch management for all affected Apple devices.

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
SafariWeb browser
Affected:< 26.5.2
IpadosOperating system
Affected:< 26.5.2
Iphone OsOperating system
Affected:< 26.5.2
macOSOperating system
Affected:< 26.5.2

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. Identify the Apple product in use
    Determine whether the device runs Safari on macOS, iOS, iPadOS, or another WebKit-based browser
    Affected if The device uses Safari, iOS, iPadOS, or macOS Tahoe as the operating system
  2. Check the Safari version on macOS
    Open Safari, go to Safari > About Safari to view the version number
    Affected if The displayed version is earlier than 26.5.2
  3. Check the iOS or iPadOS version
    Go to Settings > General > About on the iPhone or iPad to view the iOS/iPadOS version
    Affected if The displayed version is earlier than 26.5.2
  4. Check the macOS version
    Go to System Settings > About or use System Preferences > About This Mac to view the macOS version
    Affected if The system runs macOS Tahoe and the version is earlier than 26.5.2
  5. Confirm WebKit is exposed
    Verify that Safari or a WebKit-based browser is used as the default or primary browser
    Affected if Users can access untrusted web content through a vulnerable WebKit instance

The environment is affected if any Safari, iOS, iPadOS, or macOS Tahoe installation is earlier than version 26.5.2 and can render web content via WebKit.

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.

dbcve · scoped
Upgrade available Upgrade to 26.5.2 or later
Fixed in 26.5.2
Interim mitigation

Apply vendor-supplied updates: Safari 26.5.2, iOS/iPadOS 26.5.2, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, and watchOS 26.6. Organizations should prioritize patch management for all affected Apple devices.

Recommended fix High confidence

Safari 26.5.2, iOS 26.5.2, iPadOS 26.5.2, or macOS Tahoe 26.5.2

  1. Identify the affected Apple device (iPhone, iPad, or Mac)
  2. Check the current Safari/iOS/iPadOS/macOS version in Settings > General > Software Update or Safari > About Safari
  3. For iPhone/iPad: Go to Settings > General > Software Update and install iOS/iPadOS 26.5.2 or later
  4. For Mac: Go to System Settings > General > Software Update and install macOS Tahoe 26.5.2 or later
  5. For Safari standalone: Open App Store and update Safari to version 26.5.2 or later
  6. Restart the device after updating

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

Fix this in Safari 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
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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-2026-43699 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