What’s Vulnerable › Vulnerabilities

CVE-2026-84590

• Severity: unknown
• 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: 2026-10-26 · updated 2026-10-27

Description

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27.2, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2. A remote attacker may be able to cause unexpected app termination or heap corruption.

Affected products

• Apple macOS: before 15.8.2; before 26.7.2; before 27.2 — fixed in 15.8.2, 26.7.2, 27.2

How to fix

Upgrade to a fixed version: Apple macOS 15.8.2, 26.7.2, 27.2. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/149521
• https://support.apple.com/en-us/149522
• https://support.apple.com/en-us/149523

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