{"id":"GHSA-9p44-r552-4wp9","summary":"Mattermost doesn't sanitize the Remote Cluster API response on PATCH operations","details":"Mattermost versions 11.6.x \u003c= 11.6.1, 11.5.x \u003c= 11.5.4, 10.11.x \u003c= 10.11.15 fail to sanitize the Remote Cluster API response on PATCH operations, which allows authenticated users with the {{manage_secure_connections}} permission to obtain remote cluster authentication tokens via a PATCH request to the remote cluster endpoint. Mattermost Advisory ID: MMSA-2026-00662","aliases":["CVE-2026-7184","GO-2026-6282"],"modified":"2026-08-25T20:26:03.541270744Z","published":"2026-06-12T18:31:59Z","database_specific":{"cwe_ids":["CWE-201"],"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2026-08-24T21:48:36Z","nvd_published_at":"2026-06-12T17:16:27Z"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-7184"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/pull/36313"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/pull/36311"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/pull/36310"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/pull/36306"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/pull/36288"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/cad3e8e51a4d8627af6442f9df8ae3667fac7fc1"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/c5e67e28271c23cb585fe1a30ae81defcde848d6"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/bd8fc92226726da06c8fabaef568cc9ebaee1cb8"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/6fd49f56b5920569218fd2fc76d8ae802942f274"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/1a0643df00c1f51a3b7e919eec034eaf955f612f"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/releases/tag/v10.11.16"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/releases/tag/v11.5.5"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/releases/tag/v11.6.2"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/releases/tag/v11.7.0"},{"type":"WEB","url":"https://mattermost.com/security-updates"},{"type":"PACKAGE","url":"https://github.com/mattermost/mattermost"}],"affected":[{"package":{"name":"github.com/mattermost/mattermost-server","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost-server"},"ranges":[{"type":"SEMVER","events":[{"introduced":"11.6.0"},{"fixed":"11.6.1"}]}],"versions":["11.6.0"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-9p44-r552-4wp9/GHSA-9p44-r552-4wp9.json"}},{"package":{"name":"github.com/mattermost/mattermost-server","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost-server"},"ranges":[{"type":"SEMVER","events":[{"introduced":"11.5.0"},{"fixed":"11.5.5"}]}],"database_specific":{"last_known_affected_version_range":"\u003c= 11.5.4","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-9p44-r552-4wp9/GHSA-9p44-r552-4wp9.json"}},{"package":{"name":"github.com/mattermost/mattermost-server","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost-server"},"ranges":[{"type":"SEMVER","events":[{"introduced":"10.11.0"},{"fixed":"10.11.16"}]}],"database_specific":{"last_known_affected_version_range":"\u003c= 10.11.15","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-9p44-r552-4wp9/GHSA-9p44-r552-4wp9.json"}},{"package":{"name":"github.com/mattermost/mattermost/server/v8","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost/server/v8"},"ranges":[{"type":"SEMVER","events":[{"introduced":"8.0.0-20250731163400-5b955468ea1e"},{"fixed":"8.0.0-20260428142921-bd8fc9222672"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-9p44-r552-4wp9/GHSA-9p44-r552-4wp9.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"}]}