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Vulnerability · Published Mar 25, 2026 · Assigned by apple

CVE-2026-20664

Medium 4.3

In plain English

A medium-severity out-of-bounds write 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 0.7% (higher than 55% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.7%top 44.9% 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 26.4, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, visionOS 26.4. Processing maliciously crafted web content may lead to an unexpected process crash.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8webkit2gtk32.52.3-1.el8_10ALSA-2026:10702
AlmaLinux:9webkit2gtk32.52.3-1.el9_8ALSA-2026:19206
AlmaLinux:9webkit2gtk32.52.3-0.el9_7.1ALSA-2026:9692
AlmaLinux:8webkit2gtk3-devel2.52.3-1.el8_10ALSA-2026:10702
AlmaLinux:9webkit2gtk3-devel2.52.3-0.el9_7.1ALSA-2026:9692
AlmaLinux:9webkit2gtk3-devel2.52.3-1.el9_8ALSA-2026:19206
AlmaLinux:8webkit2gtk3-jsc2.52.3-1.el8_10ALSA-2026:10702
AlmaLinux:9webkit2gtk3-jsc2.52.3-1.el9_8ALSA-2026:19206
AlmaLinux:9webkit2gtk3-jsc2.52.3-0.el9_7.1ALSA-2026:9692
AlmaLinux:8webkit2gtk3-jsc-devel2.52.3-1.el8_10ALSA-2026:10702
AlmaLinux:9webkit2gtk3-jsc-devel2.52.3-1.el9_8ALSA-2026:19206
AlmaLinux:9webkit2gtk3-jsc-devel2.52.3-0.el9_7.1ALSA-2026:9692
Debian:12webkit2gtkno fix listedDEBIAN-CVE-2026-20664
Debian:13webkit2gtk2.52.3-2~deb13u1DEBIAN-CVE-2026-20664
Debian:14webkit2gtk2.52.1-1DEBIAN-CVE-2026-20664
Debian:12wpewebkitno fix listedDEBIAN-CVE-2026-20664
Debian:13wpewebkitno fix listedDEBIAN-CVE-2026-20664
Debian:14wpewebkit2.52.1-1DEBIAN-CVE-2026-20664
Rocky Linux:8webkit2gtk30:2.52.3-1.el8_10RLSA-2026:10702
Rocky Linux:9webkit2gtk30:2.52.3-0.el9_7.1RLSA-2026:9692
Rocky Linux:9webkit2gtk30:2.52.3-1.el9_8RLSA-2026:19206
Ubuntu:22.04:LTSqtwebkit-opensource-srcno fix listedUBUNTU-CVE-2026-20664
Ubuntu:24.04:LTSqtwebkit-opensource-srcno fix listedUBUNTU-CVE-2026-20664
Ubuntu:22.04:LTSwebkit2gtkno fix listedUBUNTU-CVE-2026-20664
Ubuntu:24.04:LTSwebkit2gtk2.52.3-0ubuntu0.24.04.1UBUNTU-CVE-2026-20664
Ubuntu:25.10webkit2gtk2.52.3-0ubuntu0.25.10.1UBUNTU-CVE-2026-20664
Ubuntu:26.04:LTSwebkit2gtk2.52.3-0ubuntu0.26.04.2UBUNTU-CVE-2026-20664
Ubuntu:22.04:LTSwpewebkitno fix listedUBUNTU-CVE-2026-20664

Affected products (as reported)

VendorProductVersions
Apple Safari 0 – before 26.4
Apple iOS and iPadOS 0 – before 26.4
Apple macOS 0 – before 26.4
Apple visionOS 0 – before 26.4

Weakness: CWE-787, CWE-120 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

References