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CVE-2026-43745

Published: Jun 29, 2026Updated: Jun 30, 2026 Sources: CVE List NVDCWE-787
6.5MEDIUM
NVD MITRE
EPSS Score
0.3%
Top 78.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Not available

Description

An out-of-bounds write issue was addressed with improved input validation. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2. Processing maliciously crafted web content may lead to an unexpected Safari crash.

In plain language

AI Low urgency

This is a Safari browser bug that can be triggered by a specially crafted web page and may cause a browser crash; most small businesses should update Safari/iPhone/iPad/macOS when available, but there’s no evidence of widespread active exploitation right now.

Executive summary

CVE-2026-43745 is an out-of-bounds write in Safari/iOS/iPadOS/macOS triggered by processing maliciously crafted web content, leading to an unexpected crash; it requires no authentication but does require user interaction (opening the malicious content), and the fix is available in Safari 26.5.2 / iOS 26.5.2 / iPadOS 26.5.2 / macOS Tahoe 26.5.2.

If affected, business impact
Safari browser crash during browsingDisruption to staff work sessionsPotential device instability from web

What to do now

  1. Check whether your business devices (Mac, iPhone, iPad) are running Safari, iOS/iPadOS, or macOS versions older than 26.5.2.
  2. Update Safari to 26.5.2 (or update the operating system that includes it).
  3. Update iOS and iPadOS to 26.5.2.
  4. Update macOS Tahoe to 26.5.2.
  5. After updating, test that staff can open normal websites without unexpected Safari crashes.
Usually a quick update

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-787

Affected Products

Apple
commercial·USaka apple inc., apple computer
SafariOn-premDesktop App
Consumer Software / browser
ipadosEmbeddedOS
Operating Systems / mobile-os
iOS and iPadOSEmbeddedOS
Operating Systems / mobile-os
macOSOn-premOS
Operating Systems / unix-bsd
and 3 more affected products View all →

Exploitability

Official Patch Available

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://support.apple.com/en-us/127594
support.apple.com
https://support.apple.com/en-us/127595
support.apple.com
https://support.apple.com/en-us/127685
support.apple.com
News mentions
2

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