CVE-2026-43798

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.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/apple/swift-nio-ssh/security/advisories/GHSA-998x-vgvp-xwpc	Vendor Advisory Patch

Configurations

Configuration 1 (hide)

cpe:2.3:a:apple:swiftnio_ssh:*:*:*:*:*:swift:*:*

History

18 Oct 2026, 20:10

Type	Values Removed	Values Added
Summary		(es) Un único mensaje SSH manipulado otorga a un atacante de red no autenticado una escritura de pila fuera de límites de longitud y contenido controlados por el atacante contra cualquier aplicación construida sobre swift-nio-ssh. Esta vulnerabilidad se aborda en la versión 0.14.1 de swift-nio-ssh.

Information

Published : 2026-08-20 21:17

Updated : 2026-10-18 20:10

NVD link : CVE-2026-43798

Mitre link : CVE-2026-43798

CVE.ORG link : CVE-2026-43798

JSON object : View

Products Affected

apple

swiftnio_ssh

CWE

CWE-121

Stack-based Buffer Overflow

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