CVE-2026-43798
CriticalCVSS 9.8Exploitation Probability (EPSS)
Low risk26th percentile - higher than 26% of all known CVEs
Summary
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.
Risk Assessment
An attacker can remotely execute arbitrary code or cause a crash, potentially leading to system compromise or denial of service.
Recommendation
Immediately update swift-nio-ssh to version 0.14.1 or later to mitigate the vulnerability.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS