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Vulnerability · Published Jul 27, 2026 · Assigned by apple

CVE-2026-64783

High 8.8

In plain English

A high-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 37% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.4%top 62.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12webkit2gtkno fix listedDEBIAN-CVE-2026-64783
Debian:13webkit2gtk2.52.6-1~deb13u1DEBIAN-CVE-2026-64783
Debian:14webkit2gtk2.52.6-1DEBIAN-CVE-2026-64783
Debian:12wpewebkitno fix listedDEBIAN-CVE-2026-64783
Debian:13wpewebkitno fix listedDEBIAN-CVE-2026-64783
Debian:14wpewebkit2.52.6-1DEBIAN-CVE-2026-64783
Ubuntu:22.04:LTSqtwebkit-opensource-srcno fix listedUBUNTU-CVE-2026-64783
Ubuntu:24.04:LTSqtwebkit-opensource-srcno fix listedUBUNTU-CVE-2026-64783
Ubuntu:22.04:LTSwebkit2gtkno fix listedUBUNTU-CVE-2026-64783
Ubuntu:24.04:LTSwebkit2gtk2.52.6-0ubuntu0.24.04.1UBUNTU-CVE-2026-64783
Ubuntu:24.04:LTSwebkit2gtk2.52.6-0ubuntu0.24.04.1USN-8703-1
Ubuntu:26.04:LTSwebkit2gtk2.52.6-0ubuntu0.26.04.1USN-8703-1
Ubuntu:26.04:LTSwebkit2gtk2.52.6-0ubuntu0.26.04.1UBUNTU-CVE-2026-64783
Ubuntu:22.04:LTSwpewebkitno fix listedUBUNTU-CVE-2026-64783

Affected products (as reported)

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

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

References