Apple Safari up to 16.4.0 WebKit use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability, which was classified as critical, has been found in Apple Safari up to 16.4.0 (Web Browser). Affected by this issue is an unknown part of the component WebKit. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability.

The weakness was released 04/07/2023 by Clément Lecigne as HT213722 as confirmed advisory (Website). The advisory is available at This vulnerability is handled as CVE-2023-28205. Successful exploitation requires user interaction by the victim. Technical details are unknown but an exploit is available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 04/26/2023). 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 highly functional.

Upgrading to version 16.4.1 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

A use after free issue was addressed with improved memory management.






  • commercial

CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.4

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

NVD Base Score: 8.8
NVD Vector: 🔒



VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍


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

Local: No
Remote: Yes

Availability: 🔒
Status: Highly functional

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒


Threat Intelligenceinfo

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


Recommended: Upgrade
Status: 🔍

Reaction Time: 🔒
0-Day Time: 🔒
Exposure Time: 🔒

Upgrade: Safari 16.4.1


03/13/2023 CVE reserved
04/07/2023 +24 days Advisory disclosed
04/07/2023 +0 days Countermeasure disclosed
04/07/2023 +0 days VulDB entry created
04/26/2023 +19 days VulDB last update



Advisory: HT213722
Researcher: Clément Lecigne
Status: Confirmed

CVE: CVE-2023-28205 (🔒)
scip Labs:


Created: 04/07/2023 11:48 PM
Updated: 04/26/2023 08:22 AM
Changes: 04/07/2023 11:48 PM (19), 04/07/2023 11:51 PM (28), 04/26/2023 08:21 AM (2), 04/26/2023 08:22 AM (11)
Complete: 🔍


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