Unverified Password Change Affecting openc3 package, versions <6.10.5>=7.0.0.pre.rc1, <7.0.0-rc3
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RUBY-OPENC3-16415899
- published4 May 2026
- disclosed22 Apr 2026
- creditUnknown
Introduced: 22 Apr 2026
NewCVE-2026-42084 (opens in a new tab)How to fix?
Upgrade openc3 to version 6.10.5, 7.0.0-rc3 or higher.
Overview
Affected versions of this package are vulnerable to Unverified Password Change via the verify_no_service process in openc3/lib/openc3/models/auth_model.rb and openc3-cosmos-cmd-tlm-api/app/controllers/auth_controller.rb. An attacker can change a password by supplying a valid session token to the password-change flow instead of the current password. The password verification path accepts session tokens and password hashes through the same verify_no_service call, and AuthController#verify uses that path when handling password updates. As a result, anyone who can present a session token can satisfy the old-password check and replace the account password, locking the legitimate user out of their account.