RubyGems/openc3 CVE-2026-42085: medium 4.3, EPSS 0.31%
OpenC3 COSMOS allows arbitrary writes to plugins directory via path-traversed config filenames
Action: Upgrade openc3 to 6.10.5 or later.
bundle update openc3Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 6.10.5 | - |
| 7.0.0.pre.rc1 | 7.0.0-rc3 | - |
Fixed versions
| 6.10.5 | 7.0.0-rc3 |
Sources
- osv: GHSA-4jvx-93h3-f45h
- https://github.com/OpenC3/cosmos/security/advisories/GHSA-4jvx-93h3-f45h
- https://nvd.nist.gov/vuln/detail/CVE-2026-42085
- https://github.com/OpenC3/cosmos/commit/9957a9fa460c0c0cf5cdbf6a5931bbdd025246a5
- https://github.com/OpenC3/cosmos/commit/e6efccbd148ba0e3361c5891027f2373aa140d42
- https://github.com/OpenC3/cosmos
- https://github.com/OpenC3/cosmos/releases/tag/v6.10.5
- https://github.com/OpenC3/cosmos/releases/tag/v7.0.0-rc3
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/openc3/CVE-2026-42085.yml
CVE-2026-42085 · published · modified · JSON