CVE-2026-42086
medium
CVSS v3
4.6
CVSS v4 NEW
—
VIR risk
4.6
Description
OpenC3 COSMOS is Vulnerable to Self-XSS Through the Command Sender
Predictions
Exploit likelihood
56%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
References
- https://github.com/OpenC3/cosmos/security/advisories/GHSA-ffq5-qpvf-xq7x
- https://nvd.nist.gov/vuln/detail/CVE-2026-42086
- https://github.com/OpenC3/cosmos
- https://github.com/advisories/GHSA-ffq5-qpvf-xq7x
- https://github.com/pypa/advisory-database/tree/main/vulns/openc3/PYSEC-2026-105.yaml
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/openc3/CVE-2026-42086.yml
CWEs
CWE-79
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.