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CVE-2026-42084

CVE-2026-42084 · OpenC3 COSMOS: Hijacked session token can be used to reset password for persistence

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 8.1 · High · EPSS 0.3% · Fix available

Published
Updated

Stack: python

Affected products and versions

  • cosmos

    Versions
    • < 6.10.5: Affected
    • >= 7.0.0.pre.rc1, < 7.0.0-rc3: Affected

    No fix published

  • openc3 PyPI

    Versions
    • 0.1.0
    • 5.10.0
    • 5.10.1
    • 5.11.0
    • 5.11.1
    • 5.11.2
    • 5.11.3
    • 5.12.0
    • 5.13.0
    • 5.14.0
    • 5.14.1
    • 5.14.2
    • 5.15.0
    • 5.15.1
    • 5.15.2
    • 5.16.0
    • 5.16.1
    • 5.16.2
    • 5.17.0
    • 5.17.1
    • 5.18.0
    • 5.19.0
    • 5.20.0
    • 5.9.2b0
    • 6.0.0
    • 6.0.1
    • 6.0.2
    • 6.1.0
    • 6.10.0
    • 6.10.1
    • 6.10.2
    • 6.10.3
    • 6.10.4
    • 6.2.0
    • 6.2.1
    • 6.3.0
    • 6.4.0
    • 6.4.1
    • 6.4.2
    • 6.5.0
    • 6.5.1
    • 6.6.0
    • 6.7.0
    • 6.8.0
    • 6.8.1
    • 6.9.0
    • 6.9.1
    • 6.9.2
    Affected ranges
    • ECOSYSTEM: < 6.10.5

    Update to 6.10.5

Original sources

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