CVE-2026-43794Network attack vector

Memory corruption in WebKit content handling

Published Aug 17, 2026 · Updated Aug 19, 2026

Memory corruption in WebKit in Apple Safari before 26.6.1 and macOS before 26.6.2 allows remote attackers to corrupt process memory via malicious web content. Apple attributes the flaw to WebKit memory handling but has not published the specific function or operation on untrusted content that corrupts memory. Exploitation is client-side and requires a user to load attacker-controlled web content; published records describe memory corruption, with browser crash or process termination as documented outcomes in related Apple advisories.

CVSS severity8.8
High
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in WebKit in Apple Safari before 26.6.1 and macOS before 26.6.2 allows remote attackers to corrupt process memory via malicious web content. Apple attributes the flaw to WebKit memory handling but has not published the specific function or operation on untrusted content that corrupts memory. Exploitation is client-side and requires a user to load attacker-controlled web content; published records describe memory corruption, with browser crash or process termination as documented outcomes in related Apple advisories.

The record

CVE
CVE-2026-43794
Published
Aug 17, 2026
Updated
Aug 19, 2026
Vendor
Apple
Product
Safari
Classifications
CWE-119, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 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 <26.6.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · Safariversion=0 <26.6.1
Apple · macOSversion=0 <26.6.2

Published CVSS scores

8.8GitHub Advisory DatabaseCVSS: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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1189Drive-by Compromise

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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