CVE-2026-43798

critical · 9.8

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.

9.8

CVSS

0.5%

EPSS (exploit prob.)

40th

EPSS percentile

2026-08-20

Published

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-121

Affected products

Vendor	Product	Affected versions
apple	swiftnio_ssh	< 0.14.1

Check a specific version with /api/v1/cve/match.

References

https://github.com/apple/swift-nio-ssh/security/advisories/GHSA-998x-vgvp-xwpc

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-43798