Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 26.4%
CVSS Severity
CVSS v3 Score 9.8
Products affected by CVE-2026-43798
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cpe:2.3:a:apple:swiftnio_ssh:0.0.1
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cpe:2.3:a:apple:swiftnio_ssh:0.0.2
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cpe:2.3:a:apple:swiftnio_ssh:0.1.0
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cpe:2.3:a:apple:swiftnio_ssh:0.10.0
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cpe:2.3:a:apple:swiftnio_ssh:0.11.0
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cpe:2.3:a:apple:swiftnio_ssh:0.12.0
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cpe:2.3:a:apple:swiftnio_ssh:0.13.0
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cpe:2.3:a:apple:swiftnio_ssh:0.14.0
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cpe:2.3:a:apple:swiftnio_ssh:0.2.0
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cpe:2.3:a:apple:swiftnio_ssh:0.2.1
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cpe:2.3:a:apple:swiftnio_ssh:0.3.0
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cpe:2.3:a:apple:swiftnio_ssh:0.3.1
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cpe:2.3:a:apple:swiftnio_ssh:0.3.2
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cpe:2.3:a:apple:swiftnio_ssh:0.3.3
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cpe:2.3:a:apple:swiftnio_ssh:0.4.0
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cpe:2.3:a:apple:swiftnio_ssh:0.4.1
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cpe:2.3:a:apple:swiftnio_ssh:0.5.0
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cpe:2.3:a:apple:swiftnio_ssh:0.6.0
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cpe:2.3:a:apple:swiftnio_ssh:0.6.1
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cpe:2.3:a:apple:swiftnio_ssh:0.7.0
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cpe:2.3:a:apple:swiftnio_ssh:0.7.1
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cpe:2.3:a:apple:swiftnio_ssh:0.8.0
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cpe:2.3:a:apple:swiftnio_ssh:0.9.0
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cpe:2.3:a:apple:swiftnio_ssh:0.9.1