CVE-2026-20608

Web-content process crash via resource exhaustion

Published Feb 11, 2026 · Updated Feb 11, 2026

Resource exhaustion in WebKit on affected Apple platforms allows context-dependent attackers to crash a web-content process via malicious content. Apple has not published the internal WebKit locus or the state transition that mishandles attacker-controlled content; the restricted Bugzilla entry provides no public mechanism. Exploitation requires the affected device to process the crafted content, and the bounded result is an unexpected process crash rather than code execution or data access.

CVSS severity5.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Resource exhaustion in WebKit on affected Apple platforms allows context-dependent attackers to crash a web-content process via malicious content. Apple has not published the internal WebKit locus or the state transition that mishandles attacker-controlled content; the restricted Bugzilla entry provides no public mechanism. Exploitation requires the affected device to process the crafted content, and the bounded result is an unexpected process crash rather than code execution or data access.

The record

CVE
CVE-2026-20608
Published
Feb 11, 2026
Updated
Feb 11, 2026
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-770, T1499
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 11, 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=unspecified <18.7
  2. Affected versionversion=unspecified <26.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=unspecified <18.7; version=unspecified <26.3
Apple · visionOSversion=unspecified <26.3
Apple · Safariversion=unspecified <26.3
Apple · macOSversion=unspecified <26.3

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
8.8redhat-SADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/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-770Allocation of Resources Without Limits or Throttling
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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo