CVE-2026-43798
Critical
Description
A single crafted SSH message gives an unauthenticated network attacker an out-of-bounds stack write of attacker-controlled length and content against any application built on swift-nio-ssh. This vulnerability is addressed in swift-nio-ssh version 0.14.1.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Apple Swiftnio Ssh
PublishedAug 20, 2026
First seenAug 20, 2026
Weakness typeCWE-121CWE-121
How to fix
Update
- apple swiftnio_ssh0.14.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| apple swiftnio_ssh | v < 0.14.1 | 0.14.1 |
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