OpenC3 COSMOS: Authenticated OS command injection via the `pypi_url` setting

Date Sep 23, 2026
Type Vendor advisory
Signal High-risk advisory
Vendor / Product RubyGems ยท openc3
CVE CVE-2026-77601
High-risk advisory CVE-2026-77601

Summary

OpenC3 COSMOS: Authenticated OS command injection via the `pypi_url` setting

Why it matters

GitHub has published a reviewed security advisory for openc3. Prioritize it with other application dependency updates.

Operator check

Check whether openc3 is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available.

Sources

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.