CVE-2023-43000
HighExploitedPublic exploitwebkitgtk: Processing maliciously crafted web content may lead to memory corruption
Published Nov 20, 2025 · Updated Sep 21, 2026 · Also known as DEBIAN-CVE-2023-43000, UBUNTU-CVE-2023-43000
Key Facts
Patch immediately- CVE-2023-43000 is a high-severity vulnerability (CVSS 8.8 v3.1) affecting Safari (Apple), Ipados (Apple), Iphone OS (Apple) and 22 more products.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Mar 3, 2026. Public exploit code is available.
- EPSS estimates a 4.0% probability of exploitation in the next 30 days.
- Fixed versions are available, including Ipados 15.8.7, Ipados 16.6, Iphone OS 15.8.7.
- 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)
4.0%
Higher than 90.4% 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-2023-43000 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
A use-after-free issue was addressed with improved memory management. This issue is fixed in macOS Ventura 13.5, iOS 16.6 and iPadOS 16.6, Safari 16.6, iOS 15.8.7 and iPadOS 15.8.7. Processing maliciously crafted web content may lead to memory corruption.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Mar 5, 2026 | Mar 26, 2026 | Not reported |
| Industry KEV feed | Mar 3, 2026 | Mar 26, 2026 | Not reported |
| CIRCL KEV | Mar 5, 2026 | Mar 26, 2026 | Not reported |
| ENISA EUVD | Mar 5, 2026 | n/a | Not reported |
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Affected Products
449 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| SafariApple | >= unspecified | 16.6 |
| IpadosApple | See advisory | 15.8.7 |
| Iphone OSApple | See advisory | 15.8.7 |
| macOSApple | >= unspecified | 13.5 |
| webkit2gtkdebian | See advisory | 2.42.1-1~deb11u1 |
Patched Releases
Ipados
15.8.7, 16.6
Iphone OS
15.8.7, 16.6
macOS
13.5
Safari
16.6
iOS and iPadOS
15.8.7, 16.6
libjavascriptcoregtk-4_0-18
2.50.3-150400.4.130.4, 2.50.3-4.47.1, 2.50.4-150600.12.54.1, 2.50.4-160000.1.1
libjavascriptcoregtk-4_0-18-32bit
2.50.4-150600.12.54.1
libjavascriptcoregtk-4_1-0
2.50.3-150400.4.130.4, 2.50.4-150600.12.54.1, 2.50.4-160000.1.1
libjavascriptcoregtk-4_1-0-32bit
2.50.4-150600.12.54.1
libjavascriptcoregtk-6_0-1
2.50.3-150400.4.130.4, 2.50.4-150600.12.54.1, 2.50.4-160000.1.1
libwebkit2gtk-4_0-37
2.50.3-150400.4.130.4, 2.50.3-4.47.1, 2.50.4-150600.12.54.1, 2.50.4-160000.1.1
libwebkit2gtk-4_0-37-32bit
2.50.4-150600.12.54.1
libwebkit2gtk-4_1-0
2.50.3-150400.4.130.4, 2.50.4-150600.12.54.1, 2.50.4-160000.1.1
libwebkit2gtk-4_1-0-32bit
2.50.4-150600.12.54.1
libwebkit2gtk3-lang
2.50.3-4.47.1
libwebkitgtk-6_0-4
2.50.3-150400.4.130.4, 2.50.4-150600.12.54.1, 2.50.4-160000.1.1
typelib-1_0-JavaScriptCore-4_0
2.50.3-150400.4.130.4, 2.50.3-4.47.1, 2.50.4-150600.12.54.1, 2.50.4-160000.1.1
typelib-1_0-JavaScriptCore-4_1
2.50.3-150400.4.130.4, 2.50.4-150600.12.54.1, 2.50.4-160000.1.1
typelib-1_0-JavaScriptCore-6_0
2.50.4-150600.12.54.1, 2.50.4-160000.1.1
typelib-1_0-WebKit-6_0
2.50.4-150600.12.54.1, 2.50.4-160000.1.1
typelib-1_0-WebKit2-4_0
2.50.3-150400.4.130.4, 2.50.3-4.47.1, 2.50.4-150600.12.54.1, 2.50.4-160000.1.1
typelib-1_0-WebKit2-4_1
2.50.3-150400.4.130.4, 2.50.4-150600.12.54.1, 2.50.4-160000.1.1
typelib-1_0-WebKit2WebExtension-4_0
2.50.3-150400.4.130.4, 2.50.3-4.47.1, 2.50.4-150600.12.54.1, 2.50.4-160000.1.1
typelib-1_0-WebKit2WebExtension-4_1
2.50.3-150400.4.130.4, 2.50.4-150600.12.54.1, 2.50.4-160000.1.1
typelib-1_0-WebKitWebProcessExtension-6_0
2.50.4-150600.12.54.1, 2.50.4-160000.1.1
Timeline
Publicly disclosed
Nov 20, 2025
Added to Industry KEV feed
Mar 3, 2026
Added to CISA KEV
Mar 5, 2026
Added to CIRCL KEV
Mar 5, 2026
Added to ENISA EUVD
Mar 5, 2026
Last updated
Sep 21, 2026
Weakness Type
- CWE-416 Use After Free
References
- advisoryRHSA-2024:2126
- advisoryRHSA-2024:2982
- advisoryRHSA-2024:8492
- advisoryRHSA-2024:8496
- advisoryRHSA-2024:9646
FAQ
Common Questions.
A use-after-free issue was addressed with improved memory management.
Affected: Safari (Apple) versions >= unspecified; Ipados (Apple); Iphone OS (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 Mar 3, 2026.
Yes. It was added on Mar 5, 2026 with a federal remediation due date of Mar 26, 2026.
Public exploit code is available.
Fixed versions are available, including Ipados 15.8.7, Ipados 16.6, Iphone OS 15.8.7.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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