# CVE-2026-20637: AppleKeyStore: An app may be able to cause unexpected system termination

CVE-2026-20637 is fixed in 3 products on 1 platform, first by Tahoe 26.3, released February 11, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-20637
- Priority: Routine
- CVSS: 6.2 (MEDIUM)
- EPSS: 0.0035
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 11, 2026
- Vendor advisory: https://support.apple.com/en-us/126795

## Description

A use after free issue was addressed with improved memory management.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| macOS | Sequoia | 15.7.5 | [Sequoia 15.7.5](https://patchblox.com/security/data/fix/macos/sequoia-15.7.5.md) | Mar 24, 2026 |
| macOS | Sonoma | 14.8.5 | [Sonoma 14.8.5](https://patchblox.com/security/data/fix/macos/sonoma-14.8.5.md) | Mar 24, 2026 |
| macOS | Tahoe | 26.3 | [Tahoe 26.3](https://patchblox.com/security/data/fix/macos/tahoe-26.3.md) | Feb 11, 2026 |

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Data as of 2026-11-08T19:12:23Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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