CVE-2026-64718

Browser crash via WebKit Canvas use-after-free

Published Jul 27, 2026 · Updated Jul 27, 2026

Use-after-free in WebKit Canvas in Apple Safari and operating systems before 26.6 allows attackers to crash Safari via malicious web content. Apple identifies a freed-object lifetime error in WebKit Canvas but does not disclose the affected function or stale-reference operation. Processing attacker-controlled web content requires user interaction and can terminate Safari, without reported data disclosure or code execution.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in WebKit Canvas in Apple Safari and operating systems before 26.6 allows attackers to crash Safari via malicious web content. Apple identifies a freed-object lifetime error in WebKit Canvas but does not disclose the affected function or stale-reference operation. Processing attacker-controlled web content requires user interaction and can terminate Safari, without reported data disclosure or code execution.

The record

CVE
CVE-2026-64718
Published
Jul 27, 2026
Updated
Jul 27, 2026
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-416, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <26.6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=0 <26.6
Apple · visionOSversion=0 <26.6
Apple · Safariversion=0 <26.6
Apple · tvOSversion=0 <26.6
Apple · macOSversion=0 <26.6
Apple · watchOSversion=0 <26.6

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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