Apple Safari/tvOS/visionOS/watchOS/iOS/iPadOS up to 26.0 Web Content denial of service

Summaryinfo

A vulnerability described as problematic has been identified in Apple Safari, tvOS, visionOS, watchOS, iOS and iPadOS up to 26.0. This impacts an unknown function of the component Web Content Handler. The manipulation results in denial of service. This vulnerability was named CVE-2025-43458. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Apple Safari, tvOS, visionOS, watchOS, iOS and iPadOS up to 26.0. It has been classified as problematic. Affected is an unknown code block of the component Web Content Handler. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. CVE summarizes:

This issue was addressed through improved state management. This issue is fixed in tvOS 26.1, watchOS 26.1, macOS Tahoe 26.1, iOS 26.1 and iPadOS 26.1, Safari 26.1, iOS 18.7.2 and iPadOS 18.7.2, visionOS 26.1. Processing maliciously crafted web content may lead to an unexpected process crash.

The advisory is available at support.apple.com. This vulnerability is traded as CVE-2025-43458 since 04/16/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 12/18/2025). This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 277487 (Linux Distros Unpatched Vulnerability : CVE-2025-43458), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 26.1 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (277487) and CERT Bund (WID-SEC-2025-2480). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

• Apple Safari

Productinfo

Type

• Web Browser

Vendor

• Apple

Name

• iOS
• iPadOS
• Safari
• tvOS
• visionOS
• watchOS

Version

• 26.0

License

• commercial

Website

• Vendor: https://www.apple.com/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion