{"id":"CVE-2026-7184","aliases":["GHSA-9p44-r552-4wp9"],"title":"Mattermost doesn't sanitize the Remote Cluster API response on PATCH operations","summary":"Mattermost doesn't sanitize the Remote Cluster API response on PATCH operations","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","vendor":"mattermost","product":"github.com/mattermost/mattermost-server","ecosystem":"go","affected":["github.com/mattermost/mattermost-server >= 11.6.0, < 11.6.1","github.com/mattermost/mattermost-server >= 11.5.0, < 11.5.5","github.com/mattermost/mattermost-server >= 10.11.0, < 10.11.16","github.com/mattermost/mattermost/server/v8 >= 8.0.0-20250731163400-5b955468ea1e, < 8.0.0-20260428142921-bd8fc9222672"],"patched":["github.com/mattermost/mattermost-server 11.6.1","github.com/mattermost/mattermost-server 11.5.5","github.com/mattermost/mattermost-server 10.11.16","github.com/mattermost/mattermost/server/v8 8.0.0-20260428142921-bd8fc9222672"],"published":"2026-06-12","updated":"2026-08-25","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-9p44-r552-4wp9","references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-7184"},{"url":"https://github.com/mattermost/mattermost/pull/36313"},{"url":"https://github.com/mattermost/mattermost/pull/36311"},{"url":"https://github.com/mattermost/mattermost/pull/36310"},{"url":"https://github.com/mattermost/mattermost/pull/36306"},{"url":"https://github.com/mattermost/mattermost/pull/36288"},{"url":"https://github.com/mattermost/mattermost/commit/cad3e8e51a4d8627af6442f9df8ae3667fac7fc1"},{"url":"https://github.com/mattermost/mattermost/commit/c5e67e28271c23cb585fe1a30ae81defcde848d6"},{"url":"https://github.com/mattermost/mattermost/commit/bd8fc92226726da06c8fabaef568cc9ebaee1cb8"},{"url":"https://github.com/mattermost/mattermost/commit/6fd49f56b5920569218fd2fc76d8ae802942f274"},{"url":"https://github.com/mattermost/mattermost/commit/1a0643df00c1f51a3b7e919eec034eaf955f612f"},{"url":"https://github.com/mattermost/mattermost/releases/tag/v10.11.16"},{"url":"https://github.com/mattermost/mattermost/releases/tag/v11.5.5"},{"url":"https://github.com/mattermost/mattermost/releases/tag/v11.6.2"},{"url":"https://github.com/mattermost/mattermost/releases/tag/v11.7.0"},{"url":"https://mattermost.com/security-updates"},{"url":"https://github.com/mattermost/mattermost"}],"tags":["osv","go"],"epss":0.00255,"epssPercentile":0.17442,"ingestedAt":"2026-08-25T19:26:23.032Z","slug":"CVE-2026-7184","body":"## Overview\n\nMattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 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\n\n## Affected packages\n\n- `github.com/mattermost/mattermost-server >= 11.6.0, < 11.6.1`\n- `github.com/mattermost/mattermost-server >= 11.5.0, < 11.5.5`\n- `github.com/mattermost/mattermost-server >= 10.11.0, < 10.11.16`\n- `github.com/mattermost/mattermost/server/v8 >= 8.0.0-20250731163400-5b955468ea1e, < 8.0.0-20260428142921-bd8fc9222672`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `github.com/mattermost/mattermost-server 11.6.1`\n- `github.com/mattermost/mattermost-server 11.5.5`\n- `github.com/mattermost/mattermost-server 10.11.16`\n- `github.com/mattermost/mattermost/server/v8 8.0.0-20260428142921-bd8fc9222672`","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}