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9.6
OpenC3 COSMOS QuestDB Time-Series Database Data Disclosure and Deletion
GHSA-v529-vhwc-wfc5
Summary
A security issue exists in the QuestDB database used by OpenC3 COSMOS. If an attacker with certain permissions can exploit this issue, they may be able to access and delete sensitive telemetry data. To protect your data, ensure you are running an updated version of OpenC3 COSMOS and restrict permissions for users with access to the QuestDB database.
What to do
- Update ryan melton openc3 to version 7.0.0-rc3.
- Update openc3 to version 7.0.0-rc3.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| rubygems | ryan melton | openc3 |
>= 6.7.0, < 7.0.0-rc3 Fix: upgrade to 7.0.0-rc3
|
| rubygems | – | openc3 |
>= 6.7.0, < 7.0.0-rc3 Fix: upgrade to 7.0.0-rc3
|
Original title
OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. From version 6.7.0 to before version 7.0.0-rc3, a SQL injection vulnerability...
Original description
OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. From version 6.7.0 to before version 7.0.0-rc3, a SQL injection vulnerability exists in the Time-Series Database (TSDB) component of COSMOS. The tsdb_lookup function in the cvt_model.rb file directly places user-supplied input into a SQL query without sanitizing the input. As a result, a user can break out of the initial SQL statement and execute arbitrary SQL commands, including deleting data. This issue has been patched in version 7.0.0-rc3.
ghsa CVSS3.1
9.6
Vulnerability type
CWE-89
SQL Injection
- https://nvd.nist.gov/vuln/detail/CVE-2026-42087
- https://github.com/OpenC3/cosmos/security/advisories/GHSA-v529-vhwc-wfc5
- https://github.com/OpenC3/cosmos/commit/9ba60c09c8836a37a2e4ea67ab35fe403e041415
- https://github.com/OpenC3/cosmos/releases/tag/v7.0.0-rc3
- https://github.com/advisories/GHSA-v529-vhwc-wfc5
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/openc3/CVE-2026-420...
Published: 4 May 2026 · Updated: 30 May 2026 · First seen: 23 Apr 2026