CVE-2026-42085

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Source
https://cve.org/CVERecord?id=CVE-2026-42085
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-42085.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-42085
Aliases
Published
2026-05-04T17:13:39.277Z
Modified
2026-05-28T03:55:08.224863462Z
Severity
  • 4.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N CVSS Calculator
Summary
OpenC3 COSMOS: Arbitrary write to plugins directory via path-traversed config filenames
Details

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 savetoolconfig() 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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42085.json",
    "cwe_ids": [
        "CWE-23"
    ],
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/openc3/cosmos

Affected ranges

Type
GIT
Repo
https://github.com/openc3/cosmos
Events
Introduced
132648bad3b202bc5acf4d099d0af2341ec97047
Fixed
c3ea3499cc01801122361524f6ccce2fdfbc35f0

Affected versions

v7.*
v7.0.0-rc1
v7.0.0-rc2

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-42085.json"