# CVE-2026-64774: Model I/O: A remote attacker may be able to cause unexpected application termination or heap corruption

CVE-2026-64774 is fixed in 3 products on 1 platform, first by Sequoia 15.7.8, released July 27, 2026. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2026-64774
- Priority: Urgent
- CVSS: 9.8 (CRITICAL)
- EPSS: 0.0080
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 27, 2026
- Vendor advisory: https://support.apple.com/en-us/128067

## Description

An integer overflow was addressed with improved input validation.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| macOS | Sequoia | 15.7.8 | [Sequoia 15.7.8](https://patchblox.com/security/data/fix/macos/sequoia-15.7.8.md) | Jul 27, 2026 |
| macOS | Sonoma | 14.8.8 | [Sonoma 14.8.8](https://patchblox.com/security/data/fix/macos/sonoma-14.8.8.md) | Jul 27, 2026 |
| macOS | Tahoe | 26.6 | [Tahoe 26.6](https://patchblox.com/security/data/fix/macos/tahoe-26.6.md) | Jul 27, 2026 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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