CVE-2026-43798

CriticalCVSS 9.8/10Last modified Oct 18, 2026

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.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-121

Affected software

No affected versions have been published.

Timeline

Published
Aug 20, 2026
Last modified
Oct 18, 2026
NVD status
Analyzed

Related CVEs from 2026

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CVE-2026-43798: Critical severity, CVSS 9.8 | Vulnix