CVE-2025-68271 Unauthenticated Remote Code Execution in openc3-api
Unauthenticated attackers can execute arbitrary Ruby code via the JSON-RPC API due to unsafe eval usage before authorization checks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-68271?
CVE-2025-68271 is a critical code injection vulnerability in OpenC3 cosmos, published on 13 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-95
Which versions are affected by CVE-2025-68271?
2 open source packages ship an affected version, including openc3.
| Package | Affected | Fixed in |
|---|---|---|
openc3 RubyGems | From 5.0.6 | 6.10.2 |
openc3 RubyGems | From 5.0.6 | 6.10.2 |
How do I fix CVE-2025-68271?
Upgrade openc3 to 6.10.2 or later.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2025-68271 being exploited?
There is no known exploitation of CVE-2025-68271 in the wild and no public exploit code.
Sources
Also known as GHSA-w757-4qv9-mghp.