RubyGems/openc3 CVE-2026-42084: high 8.1
OpenC3 COSMOS: Hijacked session token can be used to reset password for persistence
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-wgx6-g857-jjf7
- https://github.com/OpenC3/cosmos/security/advisories/GHSA-wgx6-g857-jjf7
- https://nvd.nist.gov/vuln/detail/CVE-2026-42084
- https://github.com/OpenC3/cosmos/commit/2e623714e3426d5ae81b6f8239d4a2a6937ef776
- 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-2026-42084.yml
CVE-2026-42084 · published · modified · JSON