CVE-2023-32439
HighExploitedPublic exploitwebkitgtk: type confusion issue leading to arbitrary code execution
Published Jul 12, 2023 · Updated Aug 7, 2026 · Also known as DEBIAN-CVE-2023-32439, DSA-5449-1, UBUNTU-CVE-2023-32439
Key Facts
Patch immediately- CVE-2023-32439 is a high-severity vulnerability (CVSS 8.8 v3.1) affecting Safari (Apple), Webkitgtk\+, Ipados (Apple) and 22 more products.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jun 21, 2023. Public exploit code is available.
- EPSS estimates a 24% probability of exploitation in the next 30 days.
- Fixed versions are available, including Ipados 15.7.7, Iphone OS 15.7.7, macOS 13.4.1.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
8.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
24%
Higher than 97.8% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2023-32439 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
A type confusion issue was addressed with improved checks. This issue is fixed in iOS 16.5.1 and iPadOS 16.5.1, iOS 15.7.7 and iPadOS 15.7.7, macOS Ventura 13.4.1, Safari 16.5.1. 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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Jun 23, 2023 | Jul 14, 2023 | Not reported |
| Industry KEV feed | Jun 21, 2023 | Jul 14, 2023 | Not reported |
| CIRCL KEV | Jun 23, 2023 | Jul 14, 2023 | Not reported |
| ENISA EUVD | Jun 23, 2023 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
325 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| SafariApple | >= unspecified | 16.5.1 |
| Webkitgtk\+Webkitgtk | See advisory | 2.42.3 |
| IpadosApple | See advisory | 15.7.7 |
| Iphone OSApple | See advisory | 15.7.7 |
| macOSApple | >= unspecified | 13.4.1 |
Patched Releases
Ipados
15.7.7
Iphone OS
15.7.7
macOS
13.4.1, 13.4
Safari
16.5.1, 16.5
iOS and iPadOS
15.7, 16.5
libjavascriptcoregtk-4_0-18
2.40.5-150000.3.144.1, 2.40.5-150200.78.1, 2.40.5-150400.4.45.3, 2.40.5-2.146.1
libjavascriptcoregtk-4_0-18-32bit
2.40.5-150400.4.45.3, 2.40.5-2.146.1
libjavascriptcoregtk-4_0-18-64bit
2.40.5-150400.4.45.3
libjavascriptcoregtk-4_1-0
2.40.5-150400.4.45.3
libjavascriptcoregtk-4_1-0-32bit
2.40.5-150400.4.45.3
libjavascriptcoregtk-4_1-0-64bit
2.40.5-150400.4.45.3
libjavascriptcoregtk-6_0-1
2.40.5-150400.4.45.3
libwebkit2gtk-4_0-37
2.40.5-150000.3.144.1, 2.40.5-150200.78.1, 2.40.5-150400.4.45.3, 2.40.5-2.146.1
libwebkit2gtk-4_0-37-32bit
2.40.5-150400.4.45.3
libwebkit2gtk-4_0-37-64bit
2.40.5-150400.4.45.3
libwebkit2gtk-4_1-0
2.40.5-150400.4.45.3
libwebkit2gtk-4_1-0-32bit
2.40.5-150400.4.45.3
libwebkit2gtk-4_1-0-64bit
2.40.5-150400.4.45.3
libwebkit2gtk3-lang
2.40.5-150000.3.144.1, 2.40.5-150200.78.1, 2.40.5-2.146.1
libwebkitgtk-6_0-4
2.40.5-150400.4.45.3
typelib-1_0-JavaScriptCore-4_0
2.40.5-150000.3.144.1, 2.40.5-150200.78.1, 2.40.5-150400.4.45.3, 2.40.5-2.146.1
typelib-1_0-JavaScriptCore-4_1
2.40.5-150400.4.45.3
typelib-1_0-JavaScriptCore-6_0
2.40.5-150400.4.45.3
typelib-1_0-WebKit-6_0
2.40.5-150400.4.45.3
typelib-1_0-WebKit2-4_0
2.40.5-150000.3.144.1, 2.40.5-150200.78.1, 2.40.5-150400.4.45.3, 2.40.5-2.146.1
Timeline
Added to Industry KEV feed
Jun 21, 2023
Added to CISA KEV
Jun 23, 2023
Added to CIRCL KEV
Jun 23, 2023
Added to ENISA EUVD
Jun 23, 2023
Publicly disclosed
Jul 12, 2023
Last updated
Aug 7, 2026
Weakness Type
- CWE-94 Improper Control of Generation of Code ('Code Injection')
- CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')
References
- advisoryRHSA-2023:4201
- advisoryRHSA-2023:4202
- advisoryRHSA-2025:10364
- advisoryhttps://bugzilla.suse.com/1211658
- advisoryhttps://bugzilla.suse.com/1211659
FAQ
Common Questions.
A type confusion issue was addressed with improved checks.
Affected: Safari (Apple) versions >= unspecified; Webkitgtk\+; Ipados (Apple), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jun 21, 2023.
Yes. It was added on Jun 23, 2023 with a federal remediation due date of Jul 14, 2023.
Public exploit code is available.
Fixed versions are available, including Ipados 15.7.7, Iphone OS 15.7.7, macOS 13.4.1.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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