Apple iOS/iPadOS/Safari/visionOS/macOS up to 26.1 Web type confusion

Summaryinfo

A vulnerability identified as problematic has been detected in Apple iOS, iPadOS, Safari, visionOS and macOS up to 26.1. This affects an unknown function of the component Web Handler. Performing a manipulation results in type confusion. This vulnerability is cataloged as CVE-2025-43541. It is possible to initiate the attack remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Apple iOS, iPadOS, Safari, visionOS and macOS up to 26.1. This affects some unknown functionality of the component Web Handler. The manipulation with an unknown input leads to a type confusion vulnerability. CWE is classifying the issue as CWE-843. The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type. This is going to have an impact on availability. The summary by CVE is:

A type confusion issue was addressed with improved state handling. This issue is fixed in Safari 26.2, iOS 18.7.3 and iPadOS 18.7.3, iOS 26.2 and iPadOS 26.2, macOS Tahoe 26.2, visionOS 26.2. Processing maliciously crafted web content may lead to an unexpected Safari crash.

It is possible to read the advisory at support.apple.com. This vulnerability is uniquely identified as CVE-2025-43541 since 04/16/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 01/25/2026).

The vulnerability scanner Nessus provides a plugin with the ID 279023 (Linux Distros Unpatched Vulnerability : CVE-2025-43541), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 26.2 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (279023) and CERT Bund (WID-SEC-2025-2891). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

• Amazon Linux 2
• Red Hat Enterprise Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• SUSE openSUSE
• RESF Rocky Linux
• Open Source WebKitGTK

Productinfo

Type

• Smartphone Operating System

Vendor

• Apple

Name

• iOS
• iPadOS
• macOS
• Safari
• visionOS

Version

• 26.0
• 26.1

License

• commercial

Website

• Vendor: https://www.apple.com/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion