CVE-2026-73281

Awaiting Analysis Awaiting Analysis - Queue

OpenSSH ssh-agent Remote Security Bypass

Publication date: 2026-08-11

Last updated on: 2026-08-31

Assigner: MITRE

Description

In ssh-agent in OpenSSH before 10.5, some operations can occur remotely but were intended to occur only locally, including operations that add tokens or use keys. This is caused by misinteraction between agent locking and the session-bind@openssh.com extension.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-08-11

Last Modified

2026-08-31

Generated

2026-09-01

AI Q&A

2026-08-12

EPSS Evaluated

2026-08-30

NVD

CVE-2026-73281

EUVD

EUVD-2026-56890

Affected Vendors & Products

Vendor	Product	Version / Range
openssh	ssh-agent	to 10.5 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-669	The product does not properly transfer a resource/behavior to another sphere, or improperly imports a resource/behavior from another sphere, in a manner that provides unintended control over that resource.

Attack-Flow Graph

Executive Summary

This vulnerability in ssh-agent of OpenSSH before version 10.5 allows remote operations that were meant to be local. Specifically, it involves misinteraction between agent locking and the session-bind@openssh.com extension, enabling actions like adding tokens or using keys remotely.

Detection Guidance

To detect this vulnerability, check the OpenSSH version on your system. If it is before 10.5, the system is vulnerable. Use the command: ssh -V. If the version is below 10.5, update OpenSSH immediately.

Impact Analysis

An attacker could exploit this to perform unauthorized actions via ssh-agent, such as adding malicious tokens or using keys remotely. This could lead to unauthorized access to systems or data if the attacker gains control of the ssh-agent session.

Compliance Impact

The vulnerability in ssh-agent allows remote operations intended only for local use, which could lead to unauthorized access or manipulation of authentication tokens. This may impact compliance with GDPR by potentially exposing user authentication data or HIPAA by compromising secure access controls in healthcare environments.

Mitigation Strategies

Upgrade OpenSSH to version 10.5 or later to address the vulnerability in ssh-agent.

Hi! I’m here to help you understand CVE-2026-73281. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70