MEDIUMRubyGems →
OpenC3 COSMOS allows arbitrary writes to plugins directory via path-traversed config filenames
OpenC3 COSMOS allows arbitrary writes to plugins directory via path-traversed config filenames
Affected packages
- openc3— before 6.10.5
Exploit signal
- Known exploited (CISA KEV)
- No
- EPSS score
- —
- EPSS percentile
- —
EPSS is the probability a CVE is exploited in the wild; percentile is its rank among all CVEs.
Sources
- 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
Structured record: https://osv.dev/vulnerability/GHSA-4jvx-93h3-f45h
Recommended response stack
Some links are affiliate links — HackTribune may earn a commission at no extra cost to you.
Get incidents like this as alerts for your stack.
Join the beta