CVE-2026-43658
published 2026-05-11CVE-2026-43658: The issue was addressed with improved memory handling. This issue is fixed in Safari 26.5, iOS 26.5 and iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS…
PriorityP343high7.5CVSS 3.1
AVNACLPRNUINSUCHINAN
EPSS
0.32%
23.8th percentile
The issue was addressed with improved memory handling. This issue is fixed in Safari 26.5, iOS 26.5 and iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. 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 | < 26.5 | 26.5 |
| apple | ipados | < 26.5 | 26.5 |
| apple | iphone_os | < 26.5 | 26.5 |
| apple | macos | < 26.5 | 26.5 |
| apple | macos | >= 26.0 < 26.5 | 26.5 |
| apple | safari | < 26.5 | 26.5 |
| apple | tvos | < 26.5 | 26.5 |
| apple | visionos | < 26.5 | 26.5 |
| apple | watchos | < 26.5 | 26.5 |
| webkitgtk | webkitgtk | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
vendor_redhat7.5HIGH
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VulDB
Apple iOS/iPadOS/macOS/tvOS/visionOS/watchOS up to 26.4 Web denial of service (Nessus ID 318337 / WID-SEC-2026-1543)
vuldb·2026-07-02·CVSS 7.5
CVE-2026-43658 [HIGH] Apple iOS/iPadOS/macOS/tvOS/visionOS/watchOS up to 26.4 Web denial of service (Nessus ID 318337 / WID-SEC-2026-1543)
A vulnerability was found in Apple iOS, iPadOS, macOS, tvOS, visionOS and watchOS up to 26.4. It has been declared as problematic. Affected by this issue is some unknown functionality of the component Web Handler. Such manipulation leads to denial of service.
This vulnerability is listed as CVE-2026-43658. The attack may be performed from remote. There is no available exploit.
It is recommended to upgrade the affected component.
GHSA
GHSA-gc3p-ph3x-xqq6: The issue was addressed with improved memory handling
ghsa_unreviewed·2026-05-11
CVE-2026-43658 [HIGH] CWE-119 GHSA-gc3p-ph3x-xqq6: The issue was addressed with improved memory handling
The issue was addressed with improved memory handling. This issue is fixed in iOS 26.5 and iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. Processing maliciously crafted web content may lead to an unexpected Safari crash.
Red Hat
webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash
vendor_redhat·2026-06-02·CVSS 7.5
CVE-2026-43658 [HIGH] CWE-120 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
The issue was addressed with improved memory handling. This issue is fixed in Safari 26.5, iOS 26.5 and iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. Processing maliciously crafted web content may lead to an unexpected Safari crash.
A flaw was found in WebKitGTK. Processing malicious web content can cause an unexpected process crash due to improper memory handling.
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 possibility of remote code execution is not disca
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-43658 webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash [epel-all]
bugzilla·2026-06-02·CVSS 7.5
CVE-2026-43658 [HIGH] CVE-2026-43658 webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash [epel-all]
CVE-2026-43658 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.
Bugzilla
CVE-2026-43658 webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash
bugzilla·2026-06-02·CVSS 7.5
CVE-2026-43658 [HIGH] CVE-2026-43658 webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash
CVE-2026-43658 webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash
The issue was addressed with improved memory handling. This issue is fixed in Safari 26.5, iOS 26.5 and iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. Processing maliciously crafted web content may lead to an unexpected Safari crash.
Bugzilla
CVE-2026-43658 webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash [fedora-all]
bugzilla·2026-06-02·CVSS 7.5
CVE-2026-43658 [HIGH] CVE-2026-43658 webkitgtk: Processing maliciously crafted web content may lead to an unexpected Safari crash [fedora-all]
CVE-2026-43658 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.
Sans Isc
Apple Patches Everything, (Mon, May 11th)
blogs_sans_isc·2026-05-11·CVSS 5.5
CVE-2025-43524 [MEDIUM] Apple Patches Everything, (Mon, May 11th)
Apple Patches Everything
Published: 2026-05-11. Last Updated: 2026-05-11 22:19:13 UTC
by Johannes Ullrich (Version: 1)
0 comment(s)
Apple today released its typical feature update across it's operating systems (iOS, iPadOS, macOS, tvOS, watchOS, vision OS). With this update, Apple patched 84 different vulnerabilities. Updates are available for the "26" series of operating systems, as well as for the previous "18" version of iOS/iPadOS, and two versions back for macOS (version 14 and 15).
None of the vulnerabilities has been exploited. The number of addressed vulnerabilities is about average compared to similar Apple updates.
Figure: Number of Vulnerabilities patched for each security update. Last one in red at the end.
iOS 26.5 and iPadOS 26.5 iOS 18.7.9 and iPadOS 18.7.9 macOS Tahoe
https://support.apple.com/en-us/127110https://support.apple.com/en-us/127115https://support.apple.com/en-us/127118https://support.apple.com/en-us/127119https://support.apple.com/en-us/127120https://support.apple.com/en-us/127121https://access.redhat.com/errata/RHSA-2026:25918https://access.redhat.com/errata/RHSA-2026:25927https://access.redhat.com/errata/RHSA-2026:27728https://access.redhat.com/errata/RHSA-2026:27785https://access.redhat.com/errata/RHSA-2026:27804https://access.redhat.com/errata/RHSA-2026:28114https://access.redhat.com/errata/RHSA-2026:28146https://access.redhat.com/errata/RHSA-2026:28147https://access.redhat.com/errata/RHSA-2026:28148https://access.redhat.com/security/cve/CVE-2026-43658https://bugzilla.redhat.com/show_bug.cgi?id=2483968https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43658.json
2026-05-11
Published