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.
References
| Link | Resource |
|---|---|
| https://github.com/OpenC3/cosmos/commit/9957a9fa460c0c0cf5cdbf6a5931bbdd025246a5 | Patch |
| https://github.com/OpenC3/cosmos/commit/e6efccbd148ba0e3361c5891027f2373aa140d42 | Patch |
| https://github.com/OpenC3/cosmos/releases/tag/v6.10.5 | Release Notes |
| https://github.com/OpenC3/cosmos/releases/tag/v7.0.0-rc3 | Release Notes |
| https://github.com/OpenC3/cosmos/security/advisories/GHSA-4jvx-93h3-f45h | Exploit Vendor Advisory |
| https://github.com/OpenC3/cosmos/security/advisories/GHSA-4jvx-93h3-f45h | Exploit Vendor Advisory |
Configurations
Configuration 1 (hide)
|
History
08 May 2026, 19:54
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Openc3 cosmos
Openc3 |
|
| CPE | cpe:2.3:a:openc3:cosmos:7.0.0:rc2:*:*:open_source:*:*:* cpe:2.3:a:openc3:cosmos:*:*:*:*:open_source:*:*:* cpe:2.3:a:openc3:cosmos:7.0.0:rc1:*:*:open_source:*:*:* |
|
| References | () https://github.com/OpenC3/cosmos/commit/9957a9fa460c0c0cf5cdbf6a5931bbdd025246a5 - Patch | |
| References | () https://github.com/OpenC3/cosmos/commit/e6efccbd148ba0e3361c5891027f2373aa140d42 - Patch | |
| References | () https://github.com/OpenC3/cosmos/releases/tag/v6.10.5 - Release Notes | |
| References | () https://github.com/OpenC3/cosmos/releases/tag/v7.0.0-rc3 - Release Notes | |
| References | () https://github.com/OpenC3/cosmos/security/advisories/GHSA-4jvx-93h3-f45h - Exploit, Vendor Advisory |
04 May 2026, 19:16
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/OpenC3/cosmos/security/advisories/GHSA-4jvx-93h3-f45h - |
04 May 2026, 18:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-04 18:16
Updated : 2026-05-08 19:54
NVD link : CVE-2026-42085
Mitre link : CVE-2026-42085
CVE.ORG link : CVE-2026-42085
JSON object : View
Products Affected
openc3
- cosmos
CWE
CWE-23
Relative Path Traversal
