CVE-2026-42085Medium· 4.3▾ SunlitOpenC3 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, OpenC3 COSMOS contains a design flaw in the save_tool_config() function that …
▾ Sunlit zone — Low / medium · no exploitation signal
impact 23.7 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 13.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
Last analysed / modified upstream
0.3%
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, OpenC3 COSMOS contains a design flaw in the save_tool_config() function that allows saving tool configuration files at arbitrary locations inside the shared /plugins directory tree by supplying crafted configuration filenames. Although the implementation sufficiently mitigates standard path traversal attacks, by canonicalizing filename to an absolute path, all plugins share this same root directory. That enables users to create arbitrary file structures and overwrite existing configuration files within the shared /plugins directory. This issue has been patched in versions 6.10.5 and 7.0.0-rc3.
openc3 < 6.10.5Upgrade to a patched release:
openc3 6.10.5Connected by shared product, vendor, weakness, or advisory.
CVE-2026-42084High· 8.1OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. Prior to versions…
CVE-2026-42088High· 8.1OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. Prior to version …
CVE-2026-42087Critical· 9.6OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. From version 6.7.…
CVE-2025-28388Critical· 9.8OpenC3 COSMOS before v6.0.2 was discovered to contain hardcoded credentials for the Service Account.
CVE-2025-28384Critical· 9.1An issue in the /script-api/scripts/ endpoint of OpenC3 COSMOS before 6.1.0 allows attackers to execute a directory traversal.
CVE-2025-28382High· 7.5An issue in the openc3-api/tables endpoint of OpenC3 COSMOS before 6.1.0 allows attackers to execute a directory traversal.