{"action":"Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20260127165411-fe3052073dc6 or later.","affected":[{"fixed":"8.0.0-20260127165411-fe3052073dc6","introduced":"0"}],"component":"github.com/mattermost/mattermost/server/v8","cve_ids":["CVE-2026-2456"],"ecosystem":"Go","epss":0.00168,"exploited":false,"fixed_versions":["8.0.0-20260127165411-fe3052073dc6"],"ghsa_id":"GHSA-34g8-9fpp-46ch","id":"tcs_01M5KET604CATYX8P5QEA9XMVP","modified_at":"2026-03-26T21:11:03.241919Z","published_at":"2026-03-16T15:30:43Z","references":["https://osv.dev/vulnerability/GHSA-34g8-9fpp-46ch","https://nvd.nist.gov/vuln/detail/CVE-2026-2456","https://github.com/mattermost/mattermost/commit/fe3052073dc67e3c920baf9fe7efd44ac1d8124c","https://github.com/mattermost/mattermost","https://mattermost.com/security-updates"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"GHSA-34g8-9fpp-46ch","url":"https://osv.dev/vulnerability/GHSA-34g8-9fpp-46ch"}],"summary":"Mattermost fails to limit the size of responses from integration action endpoints"}