Apple Safari up to 16.5.0 WebKit type confusion

CVSS Meta Temp Score
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CTI Interest Score
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7.9$5k-$25k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Apple Safari up to 16.5.0. The impacted element is an unknown function of the component WebKit. Such manipulation leads to type confusion. This vulnerability is traded as CVE-2023-32439. The attack may be launched remotely. Furthermore, there is an exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Apple Safari up to 16.5.0 (Web Browser). Affected by this issue is an unknown functionality of the component WebKit. The manipulation with an unknown input leads to a type confusion vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability.

The weakness was shared 06/21/2023 as HT213816 as confirmed advisory (Website). The advisory is shared for download at support.apple.com. This vulnerability is handled as CVE-2023-32439. Successful exploitation requires user interaction by the victim. Technical details are unknown but an exploit is available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 01/03/2026). The advisory points out:

Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.

It is declared as attacked. The vulnerability scanner Nessus provides a plugin with the ID 239906 (TencentOS Server 3: webkit2gtk3 (TSSA-2023:0190)), which helps to determine the existence of the flaw in a target environment. This issue was added on 06/23/2023 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 07/14/2023:

Apply updates per vendor instructions.

Upgrading to version 16.5.1 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

A type confusion issue was addressed with improved checks.

The vulnerability is also documented in the databases at Zero-Day.cz (782), Tenable (239906) and EUVD (EUVD-2023-36683). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CNA Base Score: 8.8
CNA Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Type confusion
CWE: CWE-843
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Attacked

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 239906
Nessus Name: TencentOS Server 3: webkit2gtk3 (TSSA-2023:0190)

Zero-Day.cz: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Safari 16.5.1

Timelineinfo

05/08/2023 🔍
06/21/2023 +44 days 🔍
06/21/2023 +0 days 🔍
06/22/2023 +1 days 🔍
01/03/2026 +926 days 🔍

Sourcesinfo

Vendor: apple.com

Advisory: HT213816
Status: Confirmed

CVE: CVE-2023-32439 (🔍)
GCVE (CVE): GCVE-0-2023-32439
GCVE (VulDB): GCVE-100-232184
EUVD: 🔍
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 06/22/2023 21:54
Updated: 01/03/2026 03:11
Changes: 06/22/2023 21:54 (18), 06/22/2023 21:57 (11), 06/22/2023 21:58 (16), 07/17/2023 10:48 (2), 07/17/2023 10:53 (11), 04/29/2024 06:07 (24), 05/15/2024 17:15 (1), 06/10/2024 13:11 (2), 09/09/2024 22:30 (2), 02/03/2025 23:43 (11), 04/25/2025 10:41 (3), 06/18/2025 13:40 (2), 01/03/2026 03:11 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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