CVE-2026-43798 PUBLISHED

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.

• https://github.com/apple/swift-nio-ssh/security/advisories/GHSA-998x-vgvp-xwpc

• 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.