dbcve.org
IpadosOperating system · Apple

CVE-2026-28847

HIGH · 8.8 CVSS v3.1 Published 2026-05-11
Fix available
A fix is available. Upgrade to 18.7.9 / 26.5 or later.
See remediation →
95/100
Remediation priority · Urgent
Remotely reachable No privileges

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 issue was addressed with improved memory handling. This issue is fixed in Safari 26.5, iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. 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 memory handling vulnerability in WebKit allows processing of maliciously crafted web content to cause an unexpected process crash. The vulnerability has a CVSS 8.8 (HIGH) indicating potential for exploitation beyond denial of service. Affected products include Safari 26.5, iOS 18.7.9/26.5, iPadOS 18.7.9/26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, and watchOS 26.5.

MitigationApply vendor-supplied patches by updating all affected Apple devices to the fixed versions listed in the security advisory. Prioritize internet-facing systems and those processing untrusted web content.

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
IpadosOperating system
Affected:< 18.7.9>= 26.0, < 26.5
Iphone OsOperating system
Affected:< 18.7.9>= 26.0, < 26.5
macOSOperating system
Affected:>= 26.0, < 26.5
TvosOperating system
Affected:< 26.5
VisionosOperating system
Affected:< 26.5
WatchosOperating system
Affected:< 26.5

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
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/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. Check iOS version on iPhone or iPad
    Go to Settings > General > About > Version to view the installed iOS version
    Affected if Version is below 18.7.9 OR between 26.0 and 26.5 (excluding 26.5)
  2. Check macOS version
    Go to Apple menu > About This Mac to view the installed macOS version
    Affected if Version is between 26.0 and 26.5 (excluding 26.5)
  3. Check tvOS version
    Go to Settings > General > About > Version on Apple TV
    Affected if Version is below 26.5
  4. Check visionOS version
    Go to Settings > General > About on Apple Vision Pro
    Affected if Version is below 26.5
  5. Check watchOS version
    Go to Settings > General > About on Apple Watch
    Affected if Version is below 26.5
  6. Confirm WebKit browser usage
    Verify Safari or any WebKit-based browser is in use, as this vulnerability is triggered when processing web content
    Affected if A WebKit browser is actively used on an affected OS version

You are affected if your device runs any of the listed Apple OS versions within the affected ranges AND uses a WebKit-based browser that could process malicious web content.

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 18.7.9 / 26.5 or later
Fixed in 18.7.926.5
Interim mitigation

Apply vendor-supplied patches by updating all affected Apple devices to the fixed versions listed in the security advisory. Prioritize internet-facing systems and those processing untrusted web content.

Recommended fix High confidence

iOS 18.7.9, iPadOS 18.7.9, iOS 26.5, iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, or watchOS 26.5 (depending on device type)

  1. Identify the affected Apple device type (iPhone, iPad, Mac, Apple TV, Apple Watch, or Apple Vision Pro)
  2. Check the current OS version on the device (Settings > General > About on iOS/iPadOS, System Settings > About on macOS, Settings > General on tvOS/watchOS/visionOS)
  3. For iPhone/iPad: Navigate to Settings > General > Software Update and install iOS 18.7.9 or iOS/iPadOS 26.5 depending on which major version branch the device is on
  4. For Mac: Navigate to System Settings > General > Software Update and install macOS Tahoe 26.5
  5. For Apple TV: Go to Settings > General > Software Update and install tvOS 26.5
  6. For Apple Watch: Go to Settings > General > Software Update and install watchOS 26.5
  7. For Apple Vision Pro: Go to Settings > General > Software Update and install visionOS 26.5
  8. Verify the update was successfully installed by checking the OS version again
Caveat Standard OS update risks apply - ensure backups exist before updating

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

Fix this in Ipados 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-2026-28847 in production — separate from our analysis above.

No notes yet

Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.

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