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Vulnerability · Published Jun 29, 2026 · Assigned by apple

CVE-2026-43740

Medium 6.5

In plain English

A medium-severity use-after-free in iOS and iPadOS from Apple. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.4%top 65.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

The issue was addressed with improved memory handling. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, watchOS 26.6. Processing maliciously crafted web content may result in the disclosure of process memory.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8webkit2gtk32.52.5-1.el8_10ALSA-2026:42088
AlmaLinux:9webkit2gtk32.52.5-1.el9_8ALSA-2026:42062
AlmaLinux:8webkit2gtk3-devel2.52.5-1.el8_10ALSA-2026:42088
AlmaLinux:9webkit2gtk3-devel2.52.5-1.el9_8ALSA-2026:42062
AlmaLinux:8webkit2gtk3-jsc2.52.5-1.el8_10ALSA-2026:42088
AlmaLinux:9webkit2gtk3-jsc2.52.5-1.el9_8ALSA-2026:42062
AlmaLinux:8webkit2gtk3-jsc-devel2.52.5-1.el8_10ALSA-2026:42088
AlmaLinux:9webkit2gtk3-jsc-devel2.52.5-1.el9_8ALSA-2026:42062
Debian:12webkit2gtkno fix listedDEBIAN-CVE-2026-43740
Debian:13webkit2gtk2.52.5-1~deb13u1DEBIAN-CVE-2026-43740
Debian:14webkit2gtk2.52.5-1DEBIAN-CVE-2026-43740
Debian:12wpewebkitno fix listedDEBIAN-CVE-2026-43740
Debian:13wpewebkitno fix listedDEBIAN-CVE-2026-43740
Debian:14wpewebkit2.52.5-1DEBIAN-CVE-2026-43740
Rocky Linux:8webkit2gtk30:2.52.5-1.el8_10RLSA-2026:42088
Rocky Linux:9webkit2gtk30:2.52.5-1.el9_8RLSA-2026:42062
Ubuntu:22.04:LTSqtwebkit-opensource-srcno fix listedUBUNTU-CVE-2026-43740
Ubuntu:24.04:LTSqtwebkit-opensource-srcno fix listedUBUNTU-CVE-2026-43740
Ubuntu:22.04:LTSwebkit2gtkno fix listedUBUNTU-CVE-2026-43740
Ubuntu:24.04:LTSwebkit2gtk2.52.6-0ubuntu0.24.04.1USN-8703-1
Ubuntu:24.04:LTSwebkit2gtk2.52.6-0ubuntu0.24.04.1UBUNTU-CVE-2026-43740
Ubuntu:26.04:LTSwebkit2gtk2.52.6-0ubuntu0.26.04.1USN-8703-1
Ubuntu:26.04:LTSwebkit2gtk2.52.6-0ubuntu0.26.04.1UBUNTU-CVE-2026-43740
Ubuntu:22.04:LTSwpewebkitno fix listedUBUNTU-CVE-2026-43740

Affected products (as reported)

VendorProductVersions
Apple Safari 0 – before 26.5.2
Apple iOS and iPadOS 0 – before 26.5.2
Apple macOS 0 – before 26.5.2
Apple tvOS 0 – before 26.6
Apple visionOS 0 – before 26.6
Apple watchOS 0 – before 26.6

Weakness: CWE-416, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

References