{"action":"Upgrade go.temporal.io/server to 1.29.5 or later.","affected":[{"fixed":"1.29.5","introduced":"0"},{"fixed":"1.30.3","introduced":"1.30.0-143.0"}],"component":"go.temporal.io/server","cve_ids":["CVE-2026-5199"],"ecosystem":"Go","epss":0.00335,"exploited":false,"fixed_versions":["1.29.5","1.30.3"],"ghsa_id":"GHSA-xpg8-3hhp-p7w8","id":"tcs_01M5KGPS5QNSFXBHAV8A2WVZM9","modified_at":"2026-06-25T23:01:44.073325005Z","published_at":"2026-06-25T22:34:41Z","references":["https://osv.dev/vulnerability/GO-2026-5766","https://github.com/advisories/GHSA-xpg8-3hhp-p7w8","https://nvd.nist.gov/vuln/detail/CVE-2026-5199","https://github.com/temporalio/temporal/releases/tag/v1.29.5","https://github.com/temporalio/temporal/releases/tag/v1.30.3"],"severity":{"label":"low","score":2.3},"sources":[{"source":"osv","source_id":"GO-2026-5766","url":"https://osv.dev/vulnerability/GO-2026-5766"},{"source":"nvd","source_id":"CVE-2026-5199","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-5199"}],"summary":"Temporal Server: attacker-controlled namespace could signal, delete, and reset workflows or activities in a victim namespace on the same cluster in go.temporal.io/server"}