{"id":"CVE-2026-1629","aliases":["EUVD-2026-12516","GHSA-f77j-wjfq-qgmp"],"status":"published","title":"Permalink Preview Information Disclosure After Permission Revocation","description":"Mattermost versions 10.11.x \u003c= 10.11.10 Fail to invalidate cached permalink preview data when a user loses channel access which allows the user to continue viewing private channel content via previously cached permalink previews until cache reset or relogin.. Mattermost Advisory ID: MMSA-2026-00580","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00232,"percentile":0.14109,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-672"],"published":"2026-03-16T20:24:05Z","modified":"2026-10-28T02:30:23Z","products":[{"vendor":"mattermost","product":"mattermost"},{"vendor":"mattermost","product":"mattermost_server"}],"references":[{"url":"https://mattermost.com/security-updates","tags":["vendor-advisory","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-1629","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-f77j-wjfq-qgmp"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/1xxx/CVE-2026-1629.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-1629","title":"Permalink Preview Information Disclosure After Permission Revocation","description":"Mattermost versions 10.11.x \u003c= 10.11.10 Fail to invalidate cached permalink preview data when a user loses channel access which allows the user to continue viewing private channel content via previously cached permalink previews until cache reset or relogin.. Mattermost Advisory ID: MMSA-2026-00580","status":"published","published":"2026-03-16T20:24:05.415Z","modified":"2026-03-17T13:36:52.223Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-672"],"updated_at":"2026-11-02T14:20:01.271368Z"}],"euvd":[{"id":"EUVD-2026-12516","description":"Mattermost versions 10.11.x \u003c= 10.11.10 Fail to invalidate cached permalink preview data when a user loses channel access which allows the user to continue viewing private channel content via previously cached permalink previews until cache reset or relogin.. Mattermost Advisory ID: MMSA-2026-00580","status":"published","published":"2026-03-16T20:24:05Z","modified":"2026-03-17T13:36:52Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T19:25:33.692584Z"}],"ghsa":[{"id":"GHSA-f77j-wjfq-qgmp","title":"Mattermost versions 10.11.x \u003c= 10.11.10 Fail to invalidate cached permalink preview data when a...","description":"Mattermost versions 10.11.x \u003c= 10.11.10 Fail to invalidate cached permalink preview data when a user loses channel access which allows the user to continue viewing private channel content via previously cached permalink previews until cache reset or relogin.. Mattermost Advisory ID: MMSA-2026-00580","status":"published","published":"2026-03-16T21:34:32Z","modified":"2026-03-16T21:34:42Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-672"],"updated_at":"2026-11-02T15:06:39.944141Z"}],"nvd":[{"id":"CVE-2026-1629","description":"Mattermost versions 10.11.x \u003c= 10.11.10 Fail to invalidate cached permalink preview data when a user loses channel access which allows the user to continue viewing private channel content via previously cached permalink previews until cache reset or relogin.. Mattermost Advisory ID: MMSA-2026-00580","status":"published","published":"2026-03-16T21:16:19.727Z","modified":"2026-06-17T10:16:13.17Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-672"],"updated_at":"2026-11-02T14:12:09.735529Z"}],"osv":[{"id":"CVE-2026-1629","title":"Permalink Preview Information Disclosure After Permission Revocation","description":"Mattermost versions 10.11.x \u003c= 10.11.10 Fail to invalidate cached permalink preview data when a user loses channel access which allows the user to continue viewing private channel content via previously cached permalink previews until cache reset or relogin.. Mattermost Advisory ID: MMSA-2026-00580","status":"published","published":"2026-03-16T20:24:05.415Z","modified":"2026-10-28T02:30:23.617459074Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-672"],"updated_at":"2026-11-02T15:44:57.682091Z"}]}}