{"id":"CVE-2026-3524","summary":"Authorization Bypass in Mattermost Legal Hold Plugin Due to Missing Return After Permission Check","details":"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","modified":"2026-08-12T03:51:09.629844920Z","published":"2026-04-06T12:06:22.092Z","database_specific":{"cwe_ids":["CWE-862"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3524.json","unresolved_ranges":[{"extracted_events":[{"last_affected":"1.1.4"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"Mattermost"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3524.json"},{"type":"ADVISORY","url":"https://mattermost.com/security-updates"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-3524"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mattermost/mattermost-plugin-legal-hold","events":[{"introduced":"0"},{"fixed":"8c830da21205c49d78929e1151384ccb10e14d97"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"1.1.5"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:mattermost:legal_hold:*:*:*:*:*:mattermost:*:*"}}],"versions":["v1.1.4","v1.1.3","v1.1.2","v1.1.1","v1.1.0","v1.1.0-rc1","v1.0.2","v1.0.1","v1.0.0","v0.5.0-rc1","v0.4.3","v0.4.2","v0.4.1","v0.4.0","v0.3.4","v0.3.3","v0.3.2","v0.3.1","v0.3.0","v0.2.0","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-3524.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:H/A:H"}]}