CVE-2026-20639

configd: Processing a maliciously crafted string may lead to heap corruption

CVE-2026-20639 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: High.

High

CVSS

7.5

HIGH

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0062

50th percentile

An integer overflow was addressed with improved input validation.

Where it's fixed

Product	Fixed in	Fix	Released
macOS
Sequoia	15.7.5	Sequoia 15.7.5	Mar 24, 2026
Sonoma	14.8.5	Sonoma 14.8.5	Mar 24, 2026
Tahoe	26.3	Tahoe 26.3	Feb 11, 2026

Details

Published
February 11, 2026
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Vendor advisory
https://support.apple.com/en-us/126795

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