{"id":"CVE-2026-3524","aliases":["EUVD-2026-19231","GHSA-h7g6-pq3g-f7cw"],"status":"published","title":"Authorization Bypass in Mattermost Legal Hold Plugin Due to Missing Return After Permission Check","description":"Mattermost Plugin Legal Hold versions \u003c=1.1.4 fail to halt request processing after a failed authorization check in ServeHTTP which allows an authenticated attacker to access, create, download, and delete legal hold data via crafted API requests to the plugin's endpoints. Mattermost Advisory ID: MMSA-2026-00621","severity":{"version":"3.1","score":8.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00385,"percentile":0.329,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-862"],"published":"2026-04-06T12:06:22Z","modified":"2026-10-28T02:30:28Z","products":[{"vendor":"mattermost","product":"legal_hold"},{"vendor":"mattermost","product":"mattermost"}],"references":[{"url":"https://mattermost.com/security-updates","tags":["vendor-advisory","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-3524","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-h7g6-pq3g-f7cw"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3524.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-3524","title":"Authorization Bypass in Mattermost Legal Hold Plugin Due to Missing Return After Permission Check","description":"Mattermost Plugin Legal Hold versions \u003c=1.1.4 fail to halt request processing after a failed authorization check in ServeHTTP which allows an authenticated attacker to access, create, download, and delete legal hold data via crafted API requests to the plugin's endpoints. Mattermost Advisory ID: MMSA-2026-00621","status":"published","published":"2026-04-06T12:06:22.092Z","modified":"2026-04-07T03:55:35.396Z","cvss":[{"version":"3.1","score":8.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T13:48:58.05327Z"}],"euvd":[{"id":"EUVD-2026-19231","description":"Mattermost Plugin Legal Hold versions \u003c=1.1.4 fail to halt request processing after a failed authorization check in ServeHTTP which allows an authenticated attacker to access, create, download, and delete legal hold data via crafted API requests to the plugin's endpoints. Mattermost Advisory ID: MMSA-2026-00621","status":"published","published":"2026-04-06T12:06:22Z","modified":"2026-04-07T03:55:35Z","cvss":[{"version":"3.1","score":8.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T19:25:15.380284Z"}],"ghsa":[{"id":"GHSA-h7g6-pq3g-f7cw","title":"Mattermost Plugin Legal Hold versions \u003c=1.1.4 fail to halt request processing after a failed...","description":"Mattermost Plugin Legal Hold versions \u003c=1.1.4 fail to halt request processing after a failed authorization check in ServeHTTP which allows an authenticated attacker to access, create, download, and delete legal hold data via crafted API requests to the plugin's endpoints. Mattermost Advisory ID: MMSA-2026-00621","status":"published","published":"2026-04-06T15:31:27Z","modified":"2026-04-06T15:31:34Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T15:07:10.409602Z"}],"nvd":[{"id":"CVE-2026-3524","description":"Mattermost Plugin Legal Hold versions \u003c=1.1.4 fail to halt request processing after a failed authorization check in ServeHTTP which allows an authenticated attacker to access, create, download, and delete legal hold data via crafted API requests to the plugin's endpoints. Mattermost Advisory ID: MMSA-2026-00621","status":"published","published":"2026-04-06T13:17:18.417Z","modified":"2026-08-06T14:21:13.47Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T14:12:13.1424Z"}],"osv":[{"id":"CVE-2026-3524","title":"Authorization Bypass in Mattermost Legal Hold Plugin Due to Missing Return After Permission Check","description":"Mattermost Plugin Legal Hold versions \u003c=1.1.4 fail to halt request processing after a failed authorization check in ServeHTTP which allows an authenticated attacker to access, create, download, and delete legal hold data via crafted API requests to the plugin's endpoints. Mattermost Advisory ID: MMSA-2026-00621","status":"published","published":"2026-04-06T12:06:22.092Z","modified":"2026-10-28T02:30:28.40586426Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-862"],"updated_at":"2026-11-02T15:45:02.673625Z"}]}}