{"action":"Upgrade github.com/kcp-dev/kcp to 0.29.3 or later.","affected":[{"fixed":"0.30.3","introduced":"0.30.0"},{"fixed":"0.29.3","introduced":"0"}],"component":"github.com/kcp-dev/kcp","cve_ids":["CVE-2026-39429"],"ecosystem":"Go","epss":0.00436,"exploited":false,"fixed_versions":["0.30.3","0.29.3"],"ghsa_id":"GHSA-3j3q-wp9x-585p","id":"tcs_01M5KETZSYAYHMTR8NGXV3XQZ2","modified_at":"2026-09-10T03:50:42.424929037Z","published_at":"2026-04-08T15:04:22Z","references":["https://osv.dev/vulnerability/GHSA-3j3q-wp9x-585p","https://github.com/kcp-dev/kcp/security/advisories/GHSA-3j3q-wp9x-585p","https://nvd.nist.gov/vuln/detail/CVE-2026-39429","https://github.com/kcp-dev/kcp","https://github.com/kcp-dev/kcp/releases/tag/v0.29.3","https://github.com/kcp-dev/kcp/releases/tag/v0.30.3"],"severity":{"label":"high","score":8.2},"sources":[{"source":"osv","source_id":"GHSA-3j3q-wp9x-585p","url":"https://osv.dev/vulnerability/GHSA-3j3q-wp9x-585p"}],"summary":"kcp's cache server is accessible without authentication or authorization checks"}