Vulnerability · Published Jan 13, 2026 · Assigned by GitHub_M
CVE-2025-68271Unauthenticated Remote Code Execution in openc3-api
Critical 10.0
In plain English
A critical-severity security flaw in cosmos from OpenC3. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 51% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. From 5.0.0 to 6.10.1, OpenC3 COSMOS contains a critical remote code execution vulnerability reachable through the JSON-RPC API. When a JSON-RPC request uses the string form of certain APIs, attacker-controlled parameter text is parsed into values using String#convert_to_value. For array-like inputs, convert_to_value executes eval(). Because the cmd code path parses the command string before calling authorize(), an unauthenticated attacker can trigger Ruby code execution even though the request ultimately fails authorization (401). This vulnerability is fixed in 6.10.2.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| RubyGems | openc3 | 6.10.2 | GHSA-w757-4qv9-mghp |
Affected products (as reported)
Weakness: CWE-95 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
References
- https://github.com/OpenC3/cosmos/security/advisories/GHSA-w757-4qv9-mghp x_refsource_CONFIRM