{"action":"Upgrade github.com/mattermost/mattermost-server to 5.3.2-0.20260306123948-f5fe8ded6b63 or later.","affected":[{"fixed":"5.3.2-0.20260306123948-f5fe8ded6b63","introduced":"0"}],"component":"github.com/mattermost/mattermost-server","cve_ids":["CVE-2026-28732"],"ecosystem":"Go","epss":0.00152,"exploited":false,"fixed_versions":["5.3.2-0.20260306123948-f5fe8ded6b63"],"ghsa_id":"GHSA-wvcv-9xpm-7mqc","id":"tcs_01M5KFR69ZVF38X22D2FPJXXHB","modified_at":"2026-06-25T23:11:29.688799641Z","published_at":"2026-05-18T09:31:48Z","references":["https://osv.dev/vulnerability/GHSA-wvcv-9xpm-7mqc","https://nvd.nist.gov/vuln/detail/CVE-2026-28732","https://github.com/mattermost/mattermost/commit/f5fe8ded6b633db7804ae25b42ea12ce635d6ea6","https://github.com/mattermost/mattermost","https://mattermost.com/security-updates"],"severity":{"label":"medium","score":4.3},"sources":[{"source":"osv","source_id":"GHSA-wvcv-9xpm-7mqc#Go/github.com/mattermost/mattermost-server","url":"https://osv.dev/vulnerability/GHSA-wvcv-9xpm-7mqc"}],"summary":"Mattermost doesn't enforce slash command trigger-word uniqueness during command updates"}