Apple Safari up to 18.4 Web memory corruption

Summaryinfo

A vulnerability categorized as critical has been discovered in Apple Safari. Impacted is an unknown function of the component Web Handler. Such manipulation leads to memory corruption. This vulnerability is traded as CVE-2025-43272. The attack may be launched remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Apple Safari. Affected by this issue is an unknown functionality of the component Web Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The issue was addressed with improved memory handling. This issue is fixed in Safari 26, visionOS 26, watchOS 26, macOS Tahoe 26, iOS 26 and iPadOS 26. Processing maliciously crafted web content may lead to an unexpected Safari crash.

The advisory is shared for download at support.apple.com. This vulnerability is handled as CVE-2025-43272 since 04/16/2025. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for 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 09/25/2025).

The vulnerability scanner Nessus provides a plugin with the ID 265371 (macOS 26.x < 26.0 Multiple Vulnerabilities (125110)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 26.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (265371) and CERT Bund (WID-SEC-2025-2058). Once again VulDB remains the best source for vulnerability data.

Affected

• Apple Safari

Productinfo

Type

• Web Browser

Vendor

• Apple

Name

• Safari

Version

• 0.8
• 0.9
• 1.0
• 1.0.0
• 1.0.0b1
• 1.0.0b2
• 1.0.1
• 1.0.2
• 1.0.3
• 1.0b1
• 1.1
• 1.1.0
• 1.1.1
• 1.2
• 1.2.0
• 1.2.1
• 1.2.2
• 1.2.3
• 1.2.4
• 1.2.5
• 1.3
• 1.3.0
• 1.3.1
• 1.3.2
• 2
• 2.0
• 2.0 Pre
• 2.0.0
• 2.0.1
• 2.0.2
• 2.0.3
• 2.0.3 417.9.3
• 2.0.4
• 2.0.4 419.3
• 3
• 3.0
• 3.0.0
• 3.0.0b
• 3.0.1
• 3.0.1b
• 3.0.2
• 3.0.2b
• 3.0.3
• 3.0.3b
• 3.0.4
• 3.0.4 Beta
• 3.0.4b
• 3.1
• 3.1.0
• 3.1.0b
• 3.1.1
• 3.1.2
• 3.2
• 3.2.0
• 3.2.1
• 3.2.2
• 3.2.3
• 4
• 4.0
• 4.0 Beta
• 4.0.0b
• 4.0.1
• 4.0.2
• 4.0.3
• 4.0.4
• 4.0.5
• 4.1
• 4.1.1
• 4.1.2
• 4.1.3
• 5
• 5.0
• 5.0.1
• 5.0.5
• 5.0.6
• 5.1
• 5.1.2
• 5.1.2 (7534.52.7)
• 5.1.4
• 5.1.7
• 6
• 6.0
• 6.0.1
• 6.0.2
• 6.0.3
• 6.0.4
• 6.0.5
• 6.1
• 6.1.1
• 6.1.2
• 6.1.3
• 6.1.4
• 6.1.5
• 6.1.6
• 6.2.0
• 6.2.1
• 6.2.2
• 6.2.3
• 6.2.4
• 6.2.6
• 6.2.7
• 6.2.8
• 7.0
• 7.0.1
• 7.0.2
• 7.0.3
• 7.0.4
• 7.0.5
• 7.0.6
• 7.1.0
• 7.1.1
• 7.1.2
• 7.1.3
• 7.1.4
• 7.1.5
• 7.1.6
• 7.1.7
• 7.1.8
• 8
• 8.0
• 8.0.0
• 8.0.1
• 8.0.2
• 8.0.3
• 8.0.4
• 8.0.5
• 8.0.6
• 8.0.7
• 8.0.8
• 9.0
• 9.0.1
• 9.0.2
• 9.0.3
• 9.1
• 9.1.1
• 9.1.2
• 10
• 10.0
• 10.0.1
• 10.0.2
• 10.0.3
• 10.1
• 10.1.1
• 10.1.2
• 10.5
• 10.5.3
• 10.5.6
• 10.5.8
• 11
• 11.0
• 11.0.1
• 11.0.2
• 11.0.3
• 11.1
• 11.1.1
• 11.1.2
• 12.0
• 12.0.1
• 12.0.2
• 12.0.3
• 12.1
• 12.1.1
• 12.1.2
• 13.0
• 13.0.1
• 13.0.2
• 13.0.3
• 13.0.5
• 13.1
• 13.1.1
• 13.1.2
• 14.0
• 14.0.1
• 14.0.2
• 14.0.3
• 14.1
• 14.1.1
• 14.1.2
• 15
• 15.0
• 15.1
• 15.2
• 15.3
• 15.4
• 15.5
• 15.6
• 15.6.1
• 16
• 16.0
• 16.1
• 16.2
• 16.3
• 16.3.1
• 16.4
• 16.4.1
• 16.5
• 16.5.1
• 16.6
• 17
• 18.1
• 18.4

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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