by Kastro
Paper/Archive/CVE-2026-43798

CVE-2026-43798

Apple swift-nio-ssh — A single crafted SSH message gives an unauthenticated network attacker an out-of-bounds stack write of attacker-controlled length and con…

EPSS 0.5%CVSS 9.8
critical.is priorityof 100
38
CVSS 9.8 (ADP)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 40.7.407 × 208.1No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
swift-nio-ssh< 0.14.10.14.1CNA

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgithub.com/apple/swift-nio-ssh/security/advisories/GHSA-998x-vgvp-xwpc