CVE Tools
Sign in

CVE-2026-43720

Published: Jun 29, 2026Updated: Jun 30, 2026 Sources: CVE List NVDCWE-416
6.5MEDIUM
NVD MITRE
EPSS Score
0.5%
Top 60.7%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

A use-after-free issue was addressed with improved memory management. 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 Safari/iPhone/iPad/Mac bug can let a malicious website crash your browser, but it requires you to click and open the site—update to Safari 26.5.2 (and iOS/iPadOS/macOS 26.5.2) to stay protected.

Executive summary

CVE-2026-43720 is a use-after-free bug (CWE-416) in Safari’s handling of maliciously crafted web content that can be triggered when a user opens a hostile website, leading to a browser crash; fixed in Safari 26.5.2, iOS 26.5.2, iPadOS 26.5.2, and macOS Tahoe 26.5.2.

If affected, business impact
Browser crashing during site visitsLost productivity from repeated crashesRisk of disrupted online work

What to do now

  1. Check your device’s software update level (Safari on Mac, and iOS/iPadOS on iPhone/iPad) to see if it’s on 26.5.2 or later.
  2. Update Safari and your operating system to version 26.5.2 on all affected devices (Safari 26.5.2, iOS 26.5.2, iPadOS 26.5.2, macOS Tahoe 26.5.2).
  3. Until updated, avoid opening links from unknown or unexpected messages and be cautious with newly seen websites.
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-416

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
Is your org exposed to CVE-2026-43720?We can run the check for you — a free external exposure review, no install. Check my exposure

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

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2026-43720 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows