CVE-2026-64783
published 2026-07-27CVE-2026-64783: A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.6, iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, visionOS…
PriorityP347high8.8CVSS 3.1
AVNACLPRNUIRSUCHIHAH
EPSS
0.43%
36.0th percentile
A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.6, iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, visionOS 26.6, watchOS 26.6. Processing maliciously crafted web content may lead to an unexpected Safari crash.
Affected
10 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| apple | ios_and_ipados | < 26.6 | 26.6 |
| apple | ipados | < 26.6 | 26.6 |
| apple | iphone_os | < 26.6 | 26.6 |
| apple | macos | < 26.6 | 26.6 |
| apple | macos | >= 26.0 < 26.6 | 26.6 |
| apple | safari | < 26.6 | 26.6 |
| apple | visionos | < 26.6 | 26.6 |
| apple | watchos | < 26.6 | 26.6 |
| ubuntu | webkit2gtk | — | — |
| webkitgtk | webkitgtk | — | — |
CVSS provenance
nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
vendor_redhat8.8HIGH
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VulDB
Apple Safari/iOS/iPadOS/macOS/visionOS/watchOS up to 26.5 use after free
vuldb·2026-07-28
CVE-2026-64783 [CRITICAL] Apple Safari/iOS/iPadOS/macOS/visionOS/watchOS up to 26.5 use after free
A vulnerability marked as critical has been reported in Apple Safari, iOS, iPadOS, macOS, visionOS and watchOS up to 26.5. Affected by this vulnerability is an unknown functionality. This manipulation causes use after free.
The identification of this vulnerability is CVE-2026-64783. It is possible to initiate the attack remotely. There is no exploit available.
It is suggested to upgrade the affected component.
GHSA
A use-after-free issue was addressed with improved memory management.
ghsa_unreviewed·2026-07-27
CVE-2026-64783 [HIGH] CWE-416 A use-after-free issue was addressed with improved memory management.
A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.6, iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, visionOS 26.6, watchOS 26.6. Processing maliciously crafted web content may lead to an unexpected Safari crash.
Ubuntu
WebKitGTK vulnerabilities
vendor_ubuntu·2026-08-31
CVE-2026-43742 WebKitGTK vulnerabilities
Title: WebKitGTK vulnerabilities
Summary: Several security issues were fixed in WebKitGTK.
Several security issues were discovered in the WebKitGTK Web and JavaScript
engines. If a user were tricked into viewing a malicious website, a remote
attacker could exploit a variety of issues related to web browser security,
including cross-site scripting attacks, denial of service attacks, and
arbitrary code execution.
Instructions: This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart any applications
that use WebKitGTK, such as Epiphany, to make all the necessary changes.
Red Hat
webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash
vendor_redhat·2026-08-20·CVSS 8.8
CVE-2026-64783 [HIGH] CWE-416 webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash
webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash
A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.6, iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, visionOS 26.6, watchOS 26.6. Processing maliciously crafted web content may lead to an unexpected Safari crash.
A flaw was found in WebKitGTK. Processing malicious web content can cause a use-after-free issue due to improper memory management and result in an unexpected process crash.
Statement: To exploit this issue, an attacker needs to trick a user into processing or loading malicious web content. Due to this reason, this flaw has been rated with an important severity.
Additionally, this issue can cause an unexpected process crash but the possib
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-64783 webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash [fedora-all]
bugzilla·2026-08-20·CVSS 8.8
CVE-2026-64783 [HIGH] CVE-2026-64783 webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash [fedora-all]
CVE-2026-64783 webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.6, iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, visionOS 26.6, watchOS 26.6. Processing maliciously crafted web content may lead to an unexpected Safari crash.
Bugzilla
CVE-2026-64783 webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash [epel-all]
bugzilla·2026-08-20·CVSS 8.8
CVE-2026-64783 [HIGH] CVE-2026-64783 webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash [epel-all]
CVE-2026-64783 webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash [epel-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.6, iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, visionOS 26.6, watchOS 26.6. Processing maliciously crafted web content may lead to an unexpected Safari crash.
Bugzilla
CVE-2026-64783 webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash
bugzilla·2026-08-20·CVSS 8.8
CVE-2026-64783 [HIGH] CVE-2026-64783 webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash
CVE-2026-64783 webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash
A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.6, iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, visionOS 26.6, watchOS 26.6. Processing maliciously crafted web content may lead to an unexpected Safari crash.
Sans Isc
Apple Patches Everything (July 2026), (Wed, Jul 29th)
blogs_sans_isc·2026-07-29·CVSS 5.5
CVE-2026-28849 [MEDIUM] Apple Patches Everything (July 2026), (Wed, Jul 29th)
Apple Patches Everything (July 2026)
Published: 2026-07-29. Last Updated: 2026-07-29 07:32:37 UTC
by Johannes Ullrich (Version: 1)
0 comment(s)
I am a bit late with this summary, but this week Apple released updates to all its operating systems and Safari. The Safari update, as usual, targets macOS prior to macOS 26. macOS updates covered the two older versions (14 and 15), while other operating system patches only covered the current 26 versions.
A total of 187 vulnerabilities are addressed in this update. Many cover multiple operating systems. Apple did not label any of the vulnerabilities as already being exploited.
Three vulnerabilities that caught my interest are CVE-2026-28849, CVE-2026-28900, and CVE-2026-28914. These issues appear to be the vulnerability described in https://m
2026-07-27
Published