{"action":"Upgrade openc3 to 7.0.0 or later.","affected":[{"fixed":"7.0.0","introduced":"0"}],"component":"openc3","cve_ids":["CVE-2026-42086"],"ecosystem":"PyPI","epss":0.002,"exploited":false,"fixed_versions":["7.0.0"],"ghsa_id":"GHSA-ffq5-qpvf-xq7x","id":"tcs_01M5KEK12VTCAH1PSJXDC4T6XZ","modified_at":"2026-05-29T22:00:13.405819944Z","published_at":"2026-04-22T22:22:28Z","references":["https://osv.dev/vulnerability/GHSA-ffq5-qpvf-xq7x","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/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"],"severity":{"label":"medium","score":4.6},"sources":[{"source":"osv","source_id":"GHSA-ffq5-qpvf-xq7x#PyPI/openc3","url":"https://osv.dev/vulnerability/GHSA-ffq5-qpvf-xq7x"}],"summary":"OpenC3 COSMOS is Vulnerable to Self-XSS Through the Command Sender"}