CVE-2026-20664

CWE-787 — Out-of-bounds WriteCWE-120 — Classic Buffer Overflow8 documents8 sources
Severity
4.3MEDIUM
EPSS
0.0%
top 88.57%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
6
Apple IOS AND IpadosApple MacosApple Safari+3 more
Timeline
PublishedMar 25
Latest updateMar 30

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:LExploitability: 2.8 | Impact: 1.4

Affected Packages10 packages

▶CVEListV5apple/macos< 26.4
▶NVDapple/macos26.0 — 26.4
▶CVEListV5apple/safari< 26.4
▶NVDapple/ipados< 26.4
▶NVDapple/safari< 26.4

🔴Vulnerability Details

3
OSV
CVE-2026-20664: The issue was addressed with improved memory handling↗2026-03-25
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GHSA
GHSA-v2g6-mw74-wfj3: The issue was addressed with improved memory handling↗2026-03-25
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CVEList
CVE-2026-20664: The issue was addressed with improved memory handling↗2026-03-25
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📋Vendor Advisories

2
Red Hat
webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash↗2026-03-28
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Debian
CVE-2026-20664: webkit2gtk - The issue was addressed with improved memory handling. This issue is fixed in Sa...↗2026
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🕵️Threat Intelligence

1
Wiz
CVE-2026-20664 Impact, Exploitability, and Mitigation Steps | Wiz↗
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💬Community

1
Bugzilla
CVE-2026-20664 webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash [fedora-all]↗2026-03-30
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CVE-2026-20664 (MEDIUM CVSS 4.3) | The issue was addressed with improv | cvebase.io