{"action":"Upgrade github.com/mattermost/mattermost-server to 10.11.15 or later.","affected":[{"fixed":"11.6.1","introduced":"11.6.0"},{"fixed":"11.5.4","introduced":"11.5.0"},{"fixed":"11.4.5","introduced":"11.4.0"},{"fixed":"10.11.15","introduced":"10.11.0"}],"component":"github.com/mattermost/mattermost-server","cve_ids":["CVE-2026-5308"],"ecosystem":"Go","epss":0.00445,"exploited":false,"fixed_versions":["11.6.1","11.5.4","11.4.5","10.11.15"],"ghsa_id":"GHSA-jmvr-r5hm-fxfr","id":"tcs_01M5KFEFHDWCHWAT7F8N53GWNQ","modified_at":"2026-07-07T16:11:34.050559504Z","published_at":"2026-05-26T13:30:15Z","references":["https://osv.dev/vulnerability/GHSA-jmvr-r5hm-fxfr","https://nvd.nist.gov/vuln/detail/CVE-2026-5308","https://github.com/mattermost/mattermost-plugin-github/commit/9b41b1fd43c408f4be53026ee337bbeaa74ad47c","https://github.com/mattermost/mattermost","https://mattermost.com/security-updates"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"GHSA-jmvr-r5hm-fxfr","url":"https://osv.dev/vulnerability/GHSA-jmvr-r5hm-fxfr"}],"summary":"Mattermost doesn't enforce request body size limits on plugin HTTP endpoints"}