CVE-2026-42084

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

04/05/2026

Last modified:

08/05/2026

Description

OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. Prior to versions 6.10.5 and 7.0.0-rc3, the OpenC3 password change functionality allows a user to change their password without providing the old password, by accepting a valid session token instead. In assumed breach scenarios, this behaviour can be exploited by an attacker who has already obtained a valid session token, to gain persistence in hijacked account (including admin) and prevent legitimate users from accessing the account. This issue has been patched in versions 6.10.5 and 7.0.0-rc3.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N CVSS v3.1 Severity and Metrics:

Base Score: 8.10 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): None

Base Score 3.x

8.10

Severity 3.x

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:openc3:cosmos:::::open_source:::*		6.10.5 (excluding)
cpe:2.3:a:openc3:cosmos:7.0.0:rc1:::open_source:::*
cpe:2.3:a:openc3:cosmos:7.0.0:rc2:::open_source:::*

To consult the complete list of CPE names with products and versions, see this page

CVE-2026-42084

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools