dbcve.org
IpadosOperating system · Apple

CVE-2026-28983

HIGH · 7.5 CVSS v3.1 Published 2026-05-11
Fix available
A fix is available. Upgrade to 18.7.9 / 26.5 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
A type confusion issue was addressed with improved checks. This issue is fixed in iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOS 26.5, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. A remote attacker may be able to cause a 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 confidence

This is a type confusion vulnerability in multiple Apple operating systems (iOS, iPadOS, macOS, tvOS, visionOS, watchOS) that allows a remote attacker to cause denial of service. The fix involved implementing improved type checking validation to prevent the confusion between object types that could be exploited.

MitigationApply the available security updates: iOS 18.7.9/iPadOS 18.7.9 or iOS 26.5/iPadOS 26.5 for mobile devices; macOS Sequoia 15.7.8, Sonoma 14.8.8, or Tahoe 26.5 for Macs; and corresponding updates for tvOS, visionOS, and watchOS.

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
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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. Check iOS version on iPhone
    Go to Settings > General > About on the iPhone device, or use the 'sw_vers' command via SSH/terminal: `sw_vers`
    Affected if The iOS version is less than 18.7.9, or is 26.0 or higher but less than 26.5
  2. Check iPadOS version on iPad
    Go to Settings > General > About on the iPad device, or use the 'sw_vers' command via SSH/terminal: `sw_vers`
    Affected if The iPadOS version is less than 18.7.9, or is 26.0 or higher but less than 26.5
  3. Check macOS version
    Go to System Settings > About, or use the 'sw_vers' command in Terminal: `sw_vers`
    Affected if The macOS version is 26.0 or higher but less than 26.5 (Tahoe 26.5)
  4. Check tvOS version on Apple TV
    Go to Settings > General > About > Version on Apple TV, or use `tvOS` related system info if available
    Affected if The tvOS version is less than 26.5
  5. Check visionOS version on Apple Vision
    Go to Settings > General > About on the Apple Vision device
    Affected if The visionOS version is less than 26.5
  6. Check watchOS version on Apple Watch
    Open the Watch app on paired iPhone, go to My Watch > General > About, or check on Apple Watch at Settings > General > About
    Affected if The watchOS version is less than 26.5

A device is affected if its installed OS version falls within the vulnerable ranges: below 18.7.9, or between 26.0 and 26.5 for the applicable platform.

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 the available security updates: iOS 18.7.9/iPadOS 18.7.9 or iOS 26.5/iPadOS 26.5 for mobile devices; macOS Sequoia 15.7.8, Sonoma 14.8.8, or Tahoe 26.5 for Macs; and corresponding updates for tvOS, visionOS, and watchOS.

Recommended fix High confidence

iOS 18.7.9/iPadOS 18.7.9 (for 18.x branch) or iOS 26.5/iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5 (for 26.x branch)

  1. 1. Go to Settings > General > Software Update on your iPhone, iPad, or iPod touch
  2. 2. For devices running iOS/iPadOS 18.x: Upgrade to iOS 18.7.9 or iPadOS 18.7.9
  3. 3. For devices running iOS/iPadOS 26.x: Upgrade to iOS 26.5 or iPadOS 26.5
  4. 4. For macOS devices: Open System Settings > General > Software Update and upgrade to macOS Tahoe 26.5
  5. 5. For tvOS devices: Go to Settings > General > Software Update and upgrade to tvOS 26.5
  6. 6. For visionOS devices: Go to Settings > General > Software Update and upgrade to visionOS 26.5
  7. 7. For watchOS devices: On your iPhone, open the Watch app, go to General > Software Update and upgrade to watchOS 26.5
  8. 8. After upgrade, verify the new version in Settings > General > About
Caveat Standard upgrade risks apply - ensure backup before updating; some legacy apps may be incompatible with newer OS versions

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

Fix this in Ipados Scoped from the published advisory
  • Consultation1.0 h
  • Implementation2.0 h
  • Testing1.0 h
  • Review / QA1.0 h
5.0 hours of engineering $890
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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-2026-28983 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