Apple OS Env Var Validation Flaw before 26.3
CVE-2026-20627 Published on February 11, 2026
An issue existed in the handling of environment variables. This issue was addressed with improved validation. This issue is fixed in watchOS 26.3, macOS Tahoe 26.3, macOS Sonoma 14.8.4, visionOS 26.3, iOS 26.3 and iPadOS 26.3. An app may be able to access sensitive user data.
Vulnerability Analysis
CVE-2026-20627 can be exploited with local system access, requires user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.
Weakness Type
Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
Products Associated with CVE-2026-20627
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Affected Versions
Apple macOS:- Version unspecified and below 26.3 is affected.
- Version unspecified and below 26.3 is affected.
- Version unspecified and below 26.3 is affected.
- Version unspecified and below 14.8 is affected.
- Version unspecified and below 26.3 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.