CVE-2026-43798

Critical · CVSS 9.8

CVSS: 9.8; nvd
EPSS: 0.34%; 26th pct
KEV: No
Class: other; CWE-121

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.

References

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

Status: profiled · ingested 2026-09-03T18:00:49.000Z