{"action":"Upgrade github.com/mattermost/mattermost-server to 5.3.2-0.20260318173148-e9ae890a013b or later.","affected":[{"fixed":"5.3.2-0.20260318173148-e9ae890a013b","introduced":"0"}],"component":"github.com/mattermost/mattermost-server","cve_ids":["CVE-2026-6334"],"ecosystem":"Go","epss":0.00118,"exploited":false,"fixed_versions":["5.3.2-0.20260318173148-e9ae890a013b"],"ghsa_id":"GHSA-jp3f-x449-4q75","id":"tcs_01M5KFEGAG23NH19VCER9G0R7G","modified_at":"2026-06-25T23:11:46.117587494Z","published_at":"2026-05-18T09:31:47Z","references":["https://osv.dev/vulnerability/GHSA-jp3f-x449-4q75","https://nvd.nist.gov/vuln/detail/CVE-2026-6334","https://github.com/mattermost/mattermost/commit/e9ae890a013bb57989fcbdb548d8b7b86b240237","https://github.com/mattermost/mattermost","https://mattermost.com/security-updates"],"severity":{"label":"low","score":3.1},"sources":[{"source":"osv","source_id":"GHSA-jp3f-x449-4q75#Go/github.com/mattermost/mattermost-server","url":"https://osv.dev/vulnerability/GHSA-jp3f-x449-4q75"}],"summary":"Mattermost doesn't enforce client identity binding during the OAuth authorization code redemption flow"}