CVE-2026-65340Network attack vector

Browser crash via improper state management

Published Aug 17, 2026 · Updated Aug 18, 2026

Denial of service in WebKit across Apple Safari, iOS, iPadOS, and macOS allows remote attackers to crash Safari via crafted web content. WebKit mishandles state while processing attacker-controlled page content; Apple has not disclosed the affected state transition or operation. Exploitation requires a user to process the content and interrupts the browser process without reported data disclosure, modification, or system compromise.

CVSS severity4.3
Medium
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in WebKit across Apple Safari, iOS, iPadOS, and macOS allows remote attackers to crash Safari via crafted web content. WebKit mishandles state while processing attacker-controlled page content; Apple has not disclosed the affected state transition or operation. Exploitation requires a user to process the content and interrupts the browser process without reported data disclosure, modification, or system compromise.

The record

CVE
CVE-2026-65340
Published
Aug 17, 2026
Updated
Aug 18, 2026
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-703, CWE-20, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=0 <18.7.10
  2. Affected versionversion=0 <26.6.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=0 <18.7.10; version=0 <26.6.1
Apple · Safariversion=0 <26.6.1
Apple · macOSversion=0 <26.6.2

Published CVSS scores

4.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-703Improper Check or Handling of Exceptional Conditions
CWE-20Improper Input Validation
T1204.001User Execution: Malicious Link

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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