CVE-2026-35414

Status: AnalyzedHigh (8.1)—

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.

CVSS

Version: 3.1
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Base score: 8.1

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.24%
Percentile among all scored CVEs: 14
Score date: 10/6/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1190 Exploit Public-Facing Applicationinitial access75 %
Primary impactT1078.001 Default Accountsstealth · persistence · privilege escalation · initial access70 %
Secondary impactT1098.001 Additional Cloud Credentialspersistence · privilege escalation65 %

Vector CVSS AV:N (red sin privilegios) indica T1190. OpenSSH es un servicio remoto expuesto. El defecto en authorized_keys principals permite bypass de autenticación, otorgando acceso con credenciales de cuenta válida (T1078.001, T1098.001).

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Privileged Account Management Network Segmentation Multi-factor Authentication Vulnerability Scanning User Account Management Password Policies

Affected technologies (1)

Openbsd — Openssh

CWEs

CWE-670

References

Raw JSON (NVD)

Show

{
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