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.
Published: 2026-08-20
Score: 9.8 Critical
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Wed, 26 Aug 2026 17:45:00 +0000

Type Values Removed Values Added
Title Stack Out‑of‑Bounds Write via Crafted SSH Message in Swift‑NIO‑SSH

Wed, 26 Aug 2026 15:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-121
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 21 Aug 2026 13:30:00 +0000

Type Values Removed Values Added
First Time appeared Apple
Apple swiftnio Ssh
Vendors & Products Apple
Apple swiftnio Ssh

Fri, 21 Aug 2026 01:30:00 +0000

Type Values Removed Values Added
Title Stack Out‑of‑Bounds Write via Crafted SSH Message in Swift‑NIO‑SSH
Weaknesses CWE-119
CWE-122

Thu, 20 Aug 2026 21:15:00 +0000

Type Values Removed Values Added
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

Subscriptions

Apple Swiftnio Ssh
cve-icon MITRE

Status: PUBLISHED

Assigner: apple

Published:

Updated: 2026-08-26T14:05:32.813Z

Reserved: 2026-05-01T22:46:27.820Z

Link: CVE-2026-43798

cve-icon Vulnrichment

Updated: 2026-08-26T14:05:25.562Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-08-20T21:17:06.580

Modified: 2026-08-26T15:16:47.670

Link: CVE-2026-43798

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-26T17:30:10Z

Weaknesses