Apple iOS/iPadOS/macOS/tvOS/visionOS/watchOS up to 18.7.8/26.4 Web denial of service

CVSS Meta Temp Score
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CTI Interest Score
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5.8$5k-$25k0.00

Summaryinfo

A vulnerability described as problematic has been identified in Apple iOS, iPadOS, macOS, tvOS, visionOS and watchOS up to 18.7.8/26.4. The affected element is an unknown function of the component Web Handler. The manipulation results in denial of service. This vulnerability was named CVE-2026-28904. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in Apple iOS, iPadOS, macOS, tvOS, visionOS and watchOS up to 18.7.8/26.4. Affected is an unknown code block of the component Web Handler. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. CVE summarizes:

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.

The advisory is shared for download at support.apple.com. This vulnerability is traded as CVE-2026-28904 since 03/03/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 07/02/2026). The MITRE ATT&CK project declares the attack technique as T1499.

The vulnerability scanner Nessus provides a plugin with the ID 318340 (Linux Distros Unpatched Vulnerability : CVE-2026-28904), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 18.7.9 or 26.5 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (318340) and CERT Bund (WID-SEC-2026-1543). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Apple Safari

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.8

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

ADP CISA Base Score: 7.5
ADP CISA Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 318340
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-28904

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: iOS/iPadOS/macOS/tvOS/visionOS/watchOS 18.7.9/26.5

Timelineinfo

03/03/2026 CVE reserved
05/12/2026 +69 days Advisory disclosed
05/12/2026 +0 days VulDB entry created
07/02/2026 +51 days VulDB entry last update

Sourcesinfo

Vendor: apple.com

Advisory: support.apple.com
Status: Confirmed

CVE: CVE-2026-28904 (🔒)
GCVE (CVE): GCVE-0-2026-28904
GCVE (VulDB): GCVE-100-362808
CERT Bund: WID-SEC-2026-1543 - Apple Safari: Mehrere Schwachstellen

scip Labs: https://www.scip.ch/en/?labs.20180712

Entryinfo

Created: 05/12/2026 04:06
Updated: 07/02/2026 22:59
Changes: 05/12/2026 04:06 (57), 05/16/2026 03:54 (7), 06/03/2026 14:48 (2), 07/02/2026 22:59 (12)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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