Medium severity · published Mar 25, 2026
CVE-2026-20664
The issue was addressed with improved memory handling
4.3
CVSS
0.7%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 55% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
macOS · Apple
before 26.4 · source: vendor, NVD
IO
iOS · Apple
before 26.4 · source: NVD
SA
Safari · Apple
before 26.4 · source: vendor, NVD
IA
iOS and iPadOS · Apple
before 26.4 · source: vendor
VI
visionOS · Apple
before 26.4 · source: vendor, NVD
RH
Red Hat Enterprise Linux 6 · Red Hat
All versions, or not specified · source: CISA
RH
Red Hat Enterprise Linux 7 Extended Lifecycle Support · Red Hat
All versions, or not specified · source: CISA
RH
Red Hat Enterprise Linux 8 · Red Hat
All versions, or not specified · source: CISA
RH
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support · Red Hat
All versions, or not specified · source: CISA
RH
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On · Red Hat
All versions, or not specified · source: CISA
RH
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support · Red Hat
All versions, or not specified · source: CISA
RH
Red Hat Enterprise Linux 8.6 Telecommunications Update Service · Red Hat
All versions, or not specified · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-20664
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-20664
Release Notes
https://support.apple.com/en-us/126792
Release Notes
https://support.apple.com/en-us/126794
Release Notes
https://support.apple.com/en-us/126799
Release Notes
https://support.apple.com/en-us/126800
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:10702
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:11329
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