What’s Vulnerable › Vulnerabilities

CVE-2026-20691

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-25 · updated 2026-06-17
• Weakness: CWE-497

Description

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.

Affected products

• Apple iPadOS: before 26.4 — fixed in 26.4
• Apple Iphone Os: before 26.4 — fixed in 26.4
• Apple macOS: from 26.0 before 26.4 — fixed in 26.4
• Apple Safari: before 26.4 — fixed in 26.4
• Apple visionOS: before 26.4 — fixed in 26.4
• Apple watchOS: before 26.4 — fixed in 26.4

How to fix

Upgrade to a fixed version: Apple iPadOS 26.4; Apple Iphone Os 26.4; Apple macOS 26.4; Apple Safari 26.4; Apple visionOS 26.4; Apple watchOS 26.4. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/126792
• https://support.apple.com/en-us/126794
• https://support.apple.com/en-us/126798
• https://support.apple.com/en-us/126799
• https://support.apple.com/en-us/126800

Get alerted when CVE-2026-20691 or the next vulnerability affects your stack