What’s Vulnerable › Vulnerabilities

CVE-2026-20627

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-02-11 · updated 2026-08-21
• Weakness: CWE-20

Description

An issue existed in the handling of environment variables. This issue was addressed with improved validation. This issue is fixed in iOS 26.3 and iPadOS 26.3, macOS Sequoia 15.7.4, macOS Sonoma 14.8.4, macOS Tahoe 26.3, visionOS 26.3, watchOS 26.3. An app may be able to access sensitive user data.

Affected products

• Apple iPadOS: before 26.3 — fixed in 26.3
• Apple Iphone Os: before 26.3 — fixed in 26.3
• Apple macOS: from 14.0 before 14.8.4; from 26.0 before 26.3 — fixed in 14.8.4, 26.3
• Apple visionOS: before 26.3 — fixed in 26.3
• Apple watchOS: before 26.3 — fixed in 26.3

How to fix

Upgrade to a fixed version: Apple iPadOS 26.3; Apple Iphone Os 26.3; Apple macOS 14.8.4, 26.3; Apple visionOS 26.3; Apple watchOS 26.3. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/126346
• https://support.apple.com/en-us/126348
• https://support.apple.com/en-us/126349
• https://support.apple.com/en-us/126350
• https://support.apple.com/en-us/126352
• https://support.apple.com/en-us/126353

Get alerted when CVE-2026-20627 or the next vulnerability affects your stack