Apple iOS/iPadOS/macOS/tvOS/visionOS/watchOS up to 26.4 Web use after free

CVSS Meta Temp Score
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CTI Interest Score
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6.4$5k-$25k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Apple iOS, iPadOS, macOS, tvOS, visionOS and watchOS up to 26.4. Impacted is an unknown function of the component Web Handler. Executing a manipulation can lead to use after free. This vulnerability appears as CVE-2026-28947. The attack may be performed from remote. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Apple iOS, iPadOS, macOS, tvOS, visionOS and watchOS up to 26.4. This vulnerability affects an unknown functionality of the component Web Handler. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect availability. CVE summarizes:

A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.5, 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 lead to an unexpected Safari crash.

The advisory is available at support.apple.com. This vulnerability was named CVE-2026-28947 since 03/03/2026. 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. 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 07/02/2026).

The vulnerability scanner Nessus provides a plugin with the ID 318335 (Linux Distros Unpatched Vulnerability : CVE-2026-28947), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 26.5 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (318335) and CERT Bund (WID-SEC-2026-1543). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Apple Safari

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.4

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

ADP CISA Base Score: 8.8
ADP CISA Vector: 🔒

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 318335
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-28947

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: iOS/iPadOS/macOS/tvOS/visionOS/watchOS 26.5

Timelineinfo

03/03/2026 CVE reserved
05/12/2026 +69 days Advisory disclosed
05/12/2026 +0 days VulDB entry created
07/02/2026 +51 days VulDB entry last update

Sourcesinfo

Vendor: apple.com

Advisory: support.apple.com
Status: Confirmed

CVE: CVE-2026-28947 (🔒)
GCVE (CVE): GCVE-0-2026-28947
GCVE (VulDB): GCVE-100-362818
CERT Bund: WID-SEC-2026-1543 - Apple Safari: Mehrere Schwachstellen

scip Labs: https://www.scip.ch/en/?labs.20180712

Entryinfo

Created: 05/12/2026 04:10
Updated: 07/02/2026 22:59
Changes: 05/12/2026 04:10 (57), 05/16/2026 13:22 (7), 06/03/2026 15:14 (2), 07/02/2026 22:59 (12)
Complete: 🔍
Cache ID: 216::103

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

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