Improper Authorized_Keys Parsing in OpenSSH Before

Publication date: 2026-04-02

Last updated on: 2026-04-10

Assigner: MITRE

Description

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 Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-04-02

Last Modified

2026-04-10

Generated

2026-07-06

AI Q&A

2026-04-02

EPSS Evaluated

2026-07-05

NVD

CVE-2026-35414

EUVD

EUVD-2026-18480

Affected Vendors & Products

Vendor	Product	Version / Range
openbsd	openssh	to 10.3 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-670	The code contains a control flow path that does not reflect the algorithm that the path is intended to implement, leading to incorrect behavior any time this path is navigated.

Attack-Flow Graph

Impact Analysis

Exploitation of this vulnerability could lead to limited confidentiality and integrity impacts, as indicated by the CVSS score. An attacker with low privileges and high attack complexity could potentially misuse the principals option to affect the authentication process, possibly allowing unauthorized access or manipulation of authentication data.

Executive Summary

This vulnerability affects OpenSSH versions before 10.3 and involves improper handling of the authorized_keys principals option. It occurs in uncommon scenarios where a principals list is used together with a Certificate Authority that utilizes comma characters in a specific way.

Hi! I’m here to help you understand CVE-2026-35414. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70