Apple Safari/iOS/iPadOS/macOS/visionOS/watchOS up to 26.3 Webpage information disclosure

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.2$5k-$25k0.00

Summaryinfo

A vulnerability was found in Apple Safari, iOS, iPadOS, macOS, visionOS and watchOS up to 26.3 and classified as problematic. This vulnerability affects unknown code of the component Webpage Handler. Such manipulation leads to information disclosure. This vulnerability is documented as CVE-2026-20691. The attack can be executed remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Apple Safari, iOS, iPadOS, macOS, visionOS and watchOS up to 26.3. It has been rated as problematic. Affected by this issue is an unknown code of the component Webpage Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. CVE summarizes:

An authorization issue was addressed with improved state management. This issue is fixed in Safari 26.4, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, visionOS 26.4, watchOS 26.4. A maliciously crafted webpage may be able to fingerprint the user.

The advisory is shared for download at support.apple.com. This vulnerability is handled as CVE-2026-20691 since 11/11/2025. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. 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 03/31/2026). The MITRE ATT&CK project declares the attack technique as T1592.

The vulnerability scanner Nessus provides a plugin with the ID 304063 (Linux Distros Unpatched Vulnerability : CVE-2026-20691), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 26.4 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (304063) and CERT Bund (WID-SEC-2026-0911). Once again VulDB remains the best source for vulnerability data.

Affected

  • Open Source WebKitGTK

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

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

ADP CISA Base Score: 4.3
ADP CISA Vector: 🔒

CVSSv2info

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

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-DayUnlockUnlockUnlockUnlock
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Nessus ID: 304063
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-20691

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Safari/iOS/iPadOS/macOS/visionOS/watchOS 26.4

Timelineinfo

11/11/2025 CVE reserved
03/25/2026 +134 days Advisory disclosed
03/25/2026 +0 days VulDB entry created
03/31/2026 +6 days VulDB entry last update

Sourcesinfo

Vendor: apple.com

Advisory: support.apple.com
Status: Confirmed

CVE: CVE-2026-20691 (🔒)
GCVE (CVE): GCVE-0-2026-20691
GCVE (VulDB): GCVE-100-352916
CERT Bund: WID-SEC-2026-0911 - WebKitGTK: Mehrere Schwachstellen

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

Entryinfo

Created: 03/25/2026 07:35
Updated: 03/31/2026 21:43
Changes: 03/25/2026 07:35 (57), 03/29/2026 17:13 (11), 03/30/2026 14:27 (7), 03/31/2026 21:43 (2)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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