CVE-2026-84635Network attack vector

Process termination via WebKit state-management error

Published Sep 14, 2026 · Updated Sep 14, 2026

Logic error in WebKit in Apple Safari and platform releases before 27 allows remote attackers to terminate a process via crafted web content. WebKit mishandles internal state while processing attacker-controlled content, although Apple has not disclosed the responsible function or state transition. Reachability requires the affected WebKit engine to process hostile web content; the bounded effect is unexpected process termination.

CVSS severityUnavailable
Unscored
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Logic error in WebKit in Apple Safari and platform releases before 27 allows remote attackers to terminate a process via crafted web content. WebKit mishandles internal state while processing attacker-controlled content, although Apple has not disclosed the responsible function or state transition. Reachability requires the affected WebKit engine to process hostile web content; the bounded effect is unexpected process termination.

The record

CVE
CVE-2026-84635
Published
Sep 14, 2026
Updated
Sep 14, 2026
Vendor
Apple
Product
iOS and iPadOS
Classifications
T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 14, 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 <27

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=0 <27
Apple · visionOSversion=0 <27
Apple · Safariversion=0 <27
Apple · tvOSversion=0 <27
Apple · macOSversion=0 <27
Apple · watchOSversion=0 <27

Published CVSS scores

No CVSS assessment is available in this record.

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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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