dbcve.org
IpadosOperating system · Apple

CVE-2026-43813

HIGH · 7.1 CVSS v3.1 Published 2026-07-27
Fix available
A fix is available. Upgrade to 26.6 or later.
See remediation →
74/100
Remediation priority · Elevated
No privileges 3 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 validation issue was addressed with improved input sanitization. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, watchOS 26.6. A maliciously crafted app may be able to bypass code signing enforcement.

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-20

The application accepts input without confirming it is well-formed or within expected bounds, so malformed data can push the program into states its author never anticipated. Attackers probe these gaps to trigger crashes, bypass logic, or feed tainted values into more dangerous operations downstream. Remediating it well means validating and normalising every input at the boundary against a strict allow-list — not merely filtering known-bad values.

General guidance for the improper input validation 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
IpadosOperating system
Affected:< 26.6
Iphone OsOperating system
Affected:< 26.6
macOSOperating system
Affected:>= 26.0, < 26.6
TvosOperating system
Affected:< 26.6
VisionosOperating system
Affected:< 26.6
WatchosOperating system
Affected:< 26.6

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
Local
Complexity
Low
Privileges
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

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 26.6 or later
Fixed in 26.6
Recommended fix High confidence

iOS 26.6, iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, watchOS 26.6

  1. Identify the affected Apple device (iPhone, iPad, Mac, Apple TV, Apple Vision Pro, or Apple Watch)
  2. Check the current OS version installed on the device
  3. For iPhones: Upgrade to iOS 26.6 or later via Settings > General > Software Update
  4. For iPads: Upgrade to iPadOS 26.6 or later via Settings > General > Software Update
  5. For Macs: Upgrade to macOS Tahoe 26.6 or later via System Settings > General > Software Update
  6. For Apple TVs: Upgrade to tvOS 26.6 or later via Settings > System > Software Updates
  7. For Apple Vision Pro: Upgrade to visionOS 26.6 or later via Settings > General > Software Update
  8. For Apple Watches: Upgrade to watchOS 26.6 or later via the Watch app on iPhone
Caveat Major OS version upgrades may introduce compatibility issues with existing applications; test in a staging environment if possible

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

We can perform the upgrade in your staging environment and verify nothing breaks — 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-2026-43813 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