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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.

PUBLISHED Reserved 2026-04-23 | Published 2026-05-04 | Updated 2026-05-06 | Assigner GitHub_M




HIGH: 8.1CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Problem types

CWE-620: Unverified Password Change

Product status

< 6.10.5
affected

>= 7.0.0.pre.rc1, < 7.0.0-rc3
affected

References

github.com/...cosmos/security/advisories/GHSA-wgx6-g857-jjf7 exploit

github.com/...cosmos/security/advisories/GHSA-wgx6-g857-jjf7

github.com/...ommit/2e623714e3426d5ae81b6f8239d4a2a6937ef776

github.com/OpenC3/cosmos/releases/tag/v6.10.5

github.com/OpenC3/cosmos/releases/tag/v7.0.0-rc3

cve.org (CVE-2026-42084)

nvd.nist.gov (CVE-2026-42084)

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