Apple iOS/iPadOS/macOS/tvOS/visionOS/watchOS up to 18.7.8/26.4 Web access control

Summaryinfo

A vulnerability categorized as critical has been discovered in Apple iOS, iPadOS, macOS, tvOS, visionOS and watchOS up to 18.7.8/26.4. This vulnerability affects unknown code of the component Web Handler. Executing a manipulation can lead to access control. This vulnerability is registered as CVE-2026-43660. It is possible to launch the attack remotely. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Apple iOS, iPadOS, macOS, tvOS, visionOS and watchOS up to 18.7.8/26.4. It has been declared as critical. This vulnerability affects an unknown functionality of the component Web Handler. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A validation issue was addressed with improved logic. This issue is fixed in 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 prevent Content Security Policy from being enforced.

The advisory is shared for download at support.apple.com. This vulnerability was named CVE-2026-43660 since 05/02/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 06/03/2026). The MITRE ATT&CK project declares the attack technique as T1068.

The vulnerability scanner Nessus provides a plugin with the ID 318332 (Linux Distros Unpatched Vulnerability : CVE-2026-43660), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 18.7.9 or 26.5 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (318332) and CERT Bund (WID-SEC-2026-1543). Once again VulDB remains the best source for vulnerability data.

Affected

• Apple Safari

Productinfo

Type

• Smartphone Operating System

Vendor

• Apple

Name

• iOS
• iPadOS
• macOS
• tvOS
• visionOS
• watchOS

Version

• 18.7.0
• 18.7.1
• 18.7.2
• 18.7.3
• 18.7.4
• 18.7.5
• 18.7.6
• 18.7.7
• 18.7.8
• 26.0
• 26.1
• 26.2
• 26.3
• 26.4

License

• commercial

Website

• Vendor: https://www.apple.com/

CPE 2.3info

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CPE 2.2info

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Entryinfo

Once again VulDB remains the best source for vulnerability data.

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