CVE-2026-28955 - Vulnerability Details

- webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash

Description

The issue was addressed with improved memory handling. This issue is fixed in Safari 26.5, iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. Processing maliciously crafted web content may lead to an unexpected process crash.

Published: 2026-05-11

Score: 8.8 High

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Impact

An improper memory handling flaw in Apple’s Safari browser and several operating systems causes the parser that renders web content to crash when it receives maliciously crafted data. The vulnerability results in the termination of the affected process, effectively denying service to users who rely on Safari or the underlying system processes. The weakness is a buffer overflow condition (CWE-119 and CWE-120).

Affected Systems

The flaw affects Apple Safari, iOS, iPadOS, macOS, tvOS, visionOS, and watchOS. It is fixed in Safari 26.5, iOS 18.7.9 and 26.5, iPadOS 18.7.9 and 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, and watchOS 26.5; all earlier releases remain vulnerable.

Risk and Exploitability

The CVSS score of 8.8 indicates high severity, while the EPSS score of <1 % suggests a very low likelihood of exploitation. The flaw is not listed in the CISA KEV catalog and no public exploit has been documented. Based on the description, it is inferred that an attacker could deliver maliciously crafted web pages that the victim’s device loads, triggering the crash; therefore the risk is moderate but can be fully mitigated by applying the available updates.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Apple

Safari

affected

Version	Status	Constraints
`0`	affected	< 26.5

Apple

iOS and iPadOS

affected

Version	Status	Constraints
`0`	affected	< 18.7.9
`0`	affected	< 26.5

Apple

macOS

affected

Version	Status	Constraints
`0`	affected	< 26.5

Apple

tvOS

affected

Version	Status	Constraints
`0`	affected	< 26.5

Apple

visionOS

affected

Version	Status	Constraints
`0`	affected	< 26.5

Apple

watchOS

affected

Version	Status	Constraints
`0`	affected	< 26.5

Configuration 1 [-]

OR	cpe:2.3:o:apple:ipados::::::::
	cpe:2.3:o:apple:ipados::::::::
	cpe:2.3:o:apple:iphone_os::::::::
	cpe:2.3:o:apple:iphone_os::::::::
	cpe:2.3:o:apple:macos::::::::
	cpe:2.3:o:apple:tvos::::::::
	cpe:2.3:o:apple:visionos::::::::
	cpe:2.3:o:apple:watchos::::::::

No data.

Vendor Product Confidence Versions

Apple

Ios And Ipados

100%

Version	Status	Scheme	Platform
`[0,18.7.9)`	affected	generic	—
`[0,26.5)`	affected	generic	—

Apple

Macos

100%

Version	Status	Scheme	Platform
`[0,26.5)`	affected	generic	—

Apple

Tvos

100%

Version	Status	Scheme	Platform
`[0,26.5)`	affected	generic	—

Apple

Visionos

100%

Version	Status	Scheme	Platform
`[0,26.5)`	affected	generic	—

Apple

Watchos

100%

Version	Status	Scheme	Platform
`[0,26.5)`	affected	generic	—

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Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

Apply the latest updates for all Apple devices, including Safari 26.5, iOS 18.7.9/26.5, iPadOS 18.7.9/26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, and watchOS 26.5.
Configure devices to automatically install future security releases to prevent similar gaps.
Implement web‑content filtering or proxy rules to block known malicious sites until the updates are applied, especially in environments where users may access untrusted content.

Generated by OpenCVE AI on June 3, 2026 at 04:08 UTC.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00025.

Exploitation none

Automatable no

Technical Impact total

References

Link	Providers
https://nvd.nist.gov/vuln/detail/CVE-2026-28955
https://support.apple.com/en-us/127110
https://support.apple.com/en-us/127111
https://support.apple.com/en-us/127115
https://support.apple.com/en-us/127118
https://support.apple.com/en-us/127119
https://support.apple.com/en-us/127120
https://support.apple.com/en-us/127121
https://webkitgtk.org/security/WSA-2026-0003.html
https://www.cve.org/CVERecord?id=CVE-2026-28955
https://www.zerodayinitiative.com/advisories/ZDI-26-312/

History

Wed, 03 Jun 2026 02:30:00 +0000

Type	Values Removed	Values Added
Title		webkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash
Weaknesses		CWE-120
References		https://nvd.nist.gov/vuln/detail/CVE-2026-28955 https://webkitgtk.org/security/WSA-2026-0003.html https://www.cve.org/CVERecord?id=CVE-2026-28955
Metrics	threat_severity `None`	threat_severity `Important`

Fri, 22 May 2026 17:30:00 +0000

Type	Values Removed	Values Added
Title	Improper Memory Handling Triggering Process Crashes in Safari and Apple OSes

Fri, 22 May 2026 13:30:00 +0000

Type	Values Removed	Values Added
References		https://www.zerodayinitiative.com/advisories/ZDI-26-312/
Metrics	cvssV3_1 `{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}` ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`	cvssV3_1 `{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Thu, 14 May 2026 01:30:00 +0000

Type	Values Removed	Values Added
Title		Improper Memory Handling Triggering Process Crashes in Safari and Apple OSes

Wed, 13 May 2026 23:00:00 +0000

Type	Values Removed	Values Added
Title	Malicious Web Content Crash Vulnerability
Weaknesses	CWE-416 CWE-674

Wed, 13 May 2026 20:30:00 +0000

Type	Values Removed	Values Added
Description	The issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. Processing maliciously crafted web content may lead to an unexpected process crash.	The issue was addressed with improved memory handling. This issue is fixed in Safari 26.5, iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. Processing maliciously crafted web content may lead to an unexpected process crash.
References		https://support.apple.com/en-us/127121

Wed, 13 May 2026 15:30:00 +0000

Type	Values Removed	Values Added
First Time appeared		Apple ipados Apple iphone Os
CPEs		cpe:2.3:o:apple:ipados:::::::: cpe:2.3:o:apple:iphone_os:::::::: cpe:2.3:o:apple:macos:::::::: cpe:2.3:o:apple:tvos:::::::: cpe:2.3:o:apple:visionos:::::::: cpe:2.3:o:apple:watchos::::::::
Vendors & Products		Apple ipados Apple iphone Os

Tue, 12 May 2026 20:15:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-119
Metrics		cvssV3_1 `{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}` ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Mon, 11 May 2026 22:30:00 +0000

Type	Values Removed	Values Added
Title		Malicious Web Content Crash Vulnerability
Weaknesses		CWE-416 CWE-674

Mon, 11 May 2026 22:15:00 +0000

Type	Values Removed	Values Added
First Time appeared		Apple Apple ios And Ipados Apple macos Apple tvos Apple visionos Apple watchos
Vendors & Products		Apple Apple ios And Ipados Apple macos Apple tvos Apple visionos Apple watchos

Mon, 11 May 2026 20:45:00 +0000

Type	Values Removed	Values Added
Description		The issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. Processing maliciously crafted web content may lead to an unexpected process crash.
References		https://support.apple.com/en-us/127110 https://support.apple.com/en-us/127111 https://support.apple.com/en-us/127115 https://support.apple.com/en-us/127118 https://support.apple.com/en-us/127119 https://support.apple.com/en-us/127120

Subscriptions

Apple Ios And Ipados Ipados Iphone Os Macos Tvos Visionos Watchos

MITRE

Status: PUBLISHED

Assigner: apple

Published: 2026-05-11T20:07:35.071Z

Updated: 2026-05-22T12:54:42.181Z

Reserved: 2026-03-03T16:36:03.990Z

Link: CVE-2026-28955

Vulnrichment

Updated: 2026-05-12T19:51:56.656Z

NVD

Status : Modified

Published: 2026-05-11T21:18:56.570

Modified: 2026-05-22T14:16:25.250

Link: CVE-2026-28955

Redhat

Severity : Important

Publid Date: 2026-06-02T00:00:00Z

Links: CVE-2026-28955 - Bugzilla

OpenCVE Enrichment

Updated: 2026-06-03T04:15:24Z

Weaknesses

Impact

Affected Systems

Risk and Exploitability

Tracking

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

Exploitation none

Automatable no

Technical Impact total

Subscriptions

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