CVE-2026-42084

8.1 HIGH
Published: May 04, 2026 Modified: May 08, 2026
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/OpenC3/cosmos/releases/tag/v6.10.5
Source: security-advisories@github.com
Release Notes
https://github.com/OpenC3/cosmos/releases/tag/v7.0.0-rc3
Source: security-advisories@github.com
Release Notes
https://github.com/OpenC3/cosmos/security/advisories/GHSA-wgx6-g857-jjf7
Source: security-advisories@github.com
Exploit Vendor Advisory
https://github.com/OpenC3/cosmos/security/advisories/GHSA-wgx6-g857-jjf7
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Exploit Vendor Advisory

5 reference(s) from NVD

Quick Stats

CVSS v3 Score
8.1 / 10.0
EPSS (Exploit Probability)
0.3%
22th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

openc3