CVE-2023-28204
MediumExploitedPublic exploitwebkitgtk: an out-of-bounds read when processing malicious content
Published Jul 12, 2023 · Updated Aug 7, 2026 · Also known as DEBIAN-CVE-2023-28204, DSA-5427-1, SUSE-SU-2023:2606-1, SUSE-SU-2023:2607-1, SUSE-SU-2023:2647-1, UBUNTU-CVE-2023-28204, USN-6264-1
Key Facts
Patch immediately- CVE-2023-28204 is a medium-severity vulnerability (CVSS 6.5 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 May 1, 2023. Public exploit code is available.
- EPSS estimates a 14% probability of exploitation in the next 30 days.
- Fixed versions are available, including Ipados 15.7.6, Iphone OS 15.7.6, macOS 13.4.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
EPSS (30-day exploit likelihood)
14%
Higher than 96.5% 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-2023-28204 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
An out-of-bounds read was addressed with improved input validation. This issue is fixed in watchOS 9.5, tvOS 16.5, macOS Ventura 13.4, iOS 15.7.6 and iPadOS 15.7.6, Safari 16.5, iOS 16.5 and iPadOS 16.5. Processing web content may disclose sensitive information. 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 | May 22, 2023 | Jun 12, 2023 | Not reported |
| Industry KEV feed | May 1, 2023 | Jun 12, 2023 | Not reported |
| CIRCL KEV | May 22, 2023 | Jun 12, 2023 | Not reported |
| ENISA EUVD | May 22, 2023 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
382 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| SafariApple | >= unspecified | 16.5 |
| Webkitgtk\+Webkitgtk | See advisory | 2.42.3 |
| IpadosApple | See advisory | 15.7.6 |
| Iphone OSApple | See advisory | 15.7.6 |
| macOSApple | >= unspecified | 13.4 |
Patched Releases
Ipados
15.7.6
Iphone OS
15.7.6
macOS
13.4
Safari
16.5
tvOS
16.5
watchOS
9.5
iOS and iPadOS
15.7, 16.5
libjavascriptcoregtk-4_0-18
2.38.6-150200.75.2, 2.38.6-150400.4.42.4, 2.38.6-2.139.1, 2.40.5-150000.3.144.1
libjavascriptcoregtk-4_0-18-32bit
2.38.6-150400.4.42.4
libjavascriptcoregtk-4_1-0
2.38.6-150400.4.42.4
libjavascriptcoregtk-4_1-0-32bit
2.38.6-150400.4.42.4
libjavascriptcoregtk-5_0-0
2.38.6-150400.4.42.4
libwebkit2gtk-4_0-37
2.38.6-150200.75.2, 2.38.6-150400.4.42.4, 2.38.6-2.139.1, 2.40.5-150000.3.144.1
libwebkit2gtk-4_0-37-32bit
2.38.6-150400.4.42.4
libwebkit2gtk-4_1-0
2.38.6-150400.4.42.4
libwebkit2gtk-4_1-0-32bit
2.38.6-150400.4.42.4
libwebkit2gtk-5_0-0
2.38.6-150400.4.42.4
libwebkit2gtk3-lang
2.38.6-150200.75.2, 2.38.6-2.139.1, 2.40.5-150000.3.144.1
typelib-1_0-JavaScriptCore-4_0
2.38.6-150200.75.2, 2.38.6-150400.4.42.4, 2.38.6-2.139.1, 2.40.5-150000.3.144.1
typelib-1_0-JavaScriptCore-4_1
2.38.6-150400.4.42.4
typelib-1_0-JavaScriptCore-5_0
2.38.6-150400.4.42.4
typelib-1_0-WebKit2-4_0
2.38.6-150200.75.2, 2.38.6-150400.4.42.4, 2.38.6-2.139.1, 2.40.5-150000.3.144.1
typelib-1_0-WebKit2-4_1
2.38.6-150400.4.42.4
typelib-1_0-WebKit2-5_0
2.38.6-150400.4.42.4
typelib-1_0-WebKit2WebExtension-4_0
2.38.6-150200.75.2, 2.38.6-150400.4.42.4, 2.38.6-2.139.1, 2.40.5-150000.3.144.1
Timeline
Added to Industry KEV feed
May 1, 2023
Added to CISA KEV
May 22, 2023
Added to CIRCL KEV
May 22, 2023
Added to ENISA EUVD
May 22, 2023
Publicly disclosed
Jul 12, 2023
Last updated
Aug 7, 2026
Weakness Type
- CWE-20 Improper Input Validation
- CWE-125 Out-of-bounds Read
References
- advisoryRHSA-2023:3432
- advisoryRHSA-2023:3433
- advisoryRHSA-2025:10364
- advisoryhttps://bugzilla.suse.com/1211658
- advisoryhttps://bugzilla.suse.com/1211659
FAQ
Common Questions.
An out-of-bounds read was addressed with improved input validation.
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 May 1, 2023.
Yes. It was added on May 22, 2023 with a federal remediation due date of Jun 12, 2023.
Public exploit code is available.
Fixed versions are available, including Ipados 15.7.6, Iphone OS 15.7.6, macOS 13.4.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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