Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 8.1 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0031, the 23rd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:04 UTC First seen by agentprime
- 31 Oct 2026, 15:04 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-wgx6-g857-jjf7
- OSV: GHSA-wgx6-g857-jjf7
- github.com/OpenC3/cosmos/security/advisories/GHSA-wgx6-g857-jjf7
- nvd.nist.gov/vuln/detail/CVE-2026-42084
- github.com/OpenC3/cosmos/commit/2e623714e3426d5ae81b6f8239d4a2a6937ef776
- github.com/OpenC3/cosmos
- github.com/OpenC3/cosmos/releases/tag/v6.10.5
- github.com/OpenC3/cosmos/releases/tag/v7.0.0-rc3
- github.com/rubysec/ruby-advisory-db/blob/master/gems/openc3/CVE-2026-42084.yml