{"action":"Upgrade go.temporal.io/server to 1.29.5 or later.","affected":[{"fixed":"1.30.3","introduced":"1.30.0-143.0"},{"fixed":"1.29.5","introduced":"0"}],"component":"go.temporal.io/server","cve_ids":["CVE-2026-5199"],"ecosystem":"Go","epss":0.00322,"exploited":false,"fixed_versions":["1.30.3","1.29.5"],"ghsa_id":"GHSA-xpg8-3hhp-p7w8","id":"tcs_01M5KFSJBGADMKWC4GG605JFTW","modified_at":"2026-09-10T03:50:45.053934138Z","published_at":"2026-04-01T18:36:38Z","references":["https://osv.dev/vulnerability/GHSA-xpg8-3hhp-p7w8","https://nvd.nist.gov/vuln/detail/CVE-2026-5199","https://github.com/advisories/GHSA-xpg8-3hhp-p7w8","https://github.com/temporalio/temporal","https://github.com/temporalio/temporal/releases/tag/v1.29.5","https://github.com/temporalio/temporal/releases/tag/v1.30.3"],"severity":{"label":"low"},"sources":[{"source":"osv","source_id":"GHSA-xpg8-3hhp-p7w8","url":"https://osv.dev/vulnerability/GHSA-xpg8-3hhp-p7w8"}],"summary":"Temporal Server: attacker-controlled namespace could signal, delete, and reset workflows or activities in a victim namespace on the same cluster"}