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CVE-2026-43798

Quick assessment

Affected
Apple swift-nio-ssh
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apple SwiftNIO SSH是美国Apple公司的一款为Swift服务端提供SSH支持的网络组件。 Apple SwiftNIO SSH 0.14.1之前版本存在安全漏洞，该漏洞源于对特制SSH消息处理不当，可能导致未经身份验证的网络攻击者执行越界栈写入，写入攻击者控制的长度和内容。

AI Predicted 9.8 Difficulty: Easy EPSS 0.47% · P39

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Apple swift-nio-ssh < 0.14.1 affected
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I. Basic Information for CVE-2026-43798

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Apple SwiftNIO SSH 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apple SwiftNIO SSH是美国Apple公司的一款为Swift服务端提供SSH支持的网络组件。 Apple SwiftNIO SSH 0.14.1之前版本存在安全漏洞，该漏洞源于对特制SSH消息处理不当，可能导致未经身份验证的网络攻击者执行越界栈写入，写入攻击者控制的长度和内容。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apple swift-nio-ssh 0 ~ 0.14.1 -

II. Public POCs for CVE-2026-43798

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III. Intelligence Information for CVE-2026-43798

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Vendor Advisories for CVE-2026-43798 (1)

Same Patch Batch · Apple · 2026-08-20 · 4 CVEs total

CVE-2026-64777 Apple container 安全漏洞
CVE-2026-43678 Apple swift-nio 安全漏洞
CVE-2026-64773 Apple container 安全漏洞

IV. Related Vulnerabilities

Same vendor: Apple

V. Comments for CVE-2026-43798

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