Is openc3 affected by CVE-2026-42085?

RubyGems openc3 is affected in =7.0.0.pre.rc1 <7.0.0-rc3.

Is CVE-2026-42085 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.3%.

medium

CVE-2026-42085

Q: Is CVE-2026-42085 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.3%.

RubyGems · openc3

Summary

OpenC3 COSMOS allows arbitrary writes to plugins directory via path-traversed config filenames

Severity: medium
EPSS: 0.3% (p23)
Also known as: GHSA-4jvx-93h3-f45h
Published: 2026-04-22

References

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

Related advisories

GHSA-2wvh-87g2-89hr — critical · RubyGems/openc3
CVE-2026-42087 — critical · RubyGems/openc3
CVE-2025-68271 — critical · RubyGems/openc3
CVE-2025-28389 — critical · PyPI/openc3
CVE-2025-28386 — critical · PyPI/openc3
CVE-2026-42084 — high · RubyGems/openc3
CVE-2024-46977 — high · RubyGems/openc3
CVE-2026-42086 — medium · PyPI/openc3

Is your project exposed to this? Stateward checks every dependency on every pull request and flags it only if your code actually reaches it.

Check my repo

Summarize with AI

ChatGPT Claude Perplexity

Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.