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CVE-2026-35414

HighPublished

OpenSSH before 10.3 mishandles the authorized_keys principals option in uncommon scenarios involving a principals list in conjunction with a Certificate...

Published: Apr 2, 2026
Updated: Apr 2, 2026
Assigning CNA: mitre
Evidence observed: Aug 25, 2026

Primary CVSS

8.1/ 10High

nvd · CVSS 3.1

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

EPSS probability estimate

0.2%

Low · next 30 days

Percentile: 7.4%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

OpenSSH before 10.3 mishandles the authorized_keys principals option in uncommon scenarios involving a principals list in conjunction with a Certificate Authority that makes certain use of comma characters.

Sources

CVE-2026-35414PoC
Demonstrates a proof-of-concept for CVE-2026-35414, showing a vulnerable and fixed version of SSH principal matching logic to illustrate the flaw.

Responsible use

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