CVE-2026-28984Network attack vector

Browser crash via undisclosed memory-handling flaw

Published Aug 17, 2026 · Updated Aug 18, 2026

Memory-handling flaw in WebKit before Apple platform releases 18.7.10 and 26.5 allows attackers to crash Safari via crafted web content. Public advisories identify WebKit Bugzilla 311883 but do not disclose the faulty memory operation. Exploitation requires Safari or another WebKit consumer to process attacker-controlled web content, and the documented consequence is a crash.

CVSS severity4.3
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory-handling flaw in WebKit before Apple platform releases 18.7.10 and 26.5 allows attackers to crash Safari via crafted web content. Public advisories identify WebKit Bugzilla 311883 but do not disclose the faulty memory operation. Exploitation requires Safari or another WebKit consumer to process attacker-controlled web content, and the documented consequence is a crash.

The record

CVE
CVE-2026-28984
Published
Aug 17, 2026
Updated
Aug 18, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-119, CWE-416, T1499.004
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

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

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.

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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

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-416Use After Free
T1499.004Application or System Exploitation

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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