{"id":"CVE-2026-1046","summary":"Arbitrary application execution via unvalidated server-controlled URLs in Help menu","details":"Mattermost Desktop App versions \u003c=6.0 6.2.0 5.2.13.0 fail to validate help links which allows a malicious Mattermost server to execute arbitrary executables on a user’s system via the user clicking on certain items in the Help menu Mattermost Advisory ID: MMSA-2026-00577","modified":"2026-07-15T01:49:03.821200145Z","published":"2026-02-16T12:10:38.668Z","database_specific":{"cwe_ids":["CWE-939"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/1xxx/CVE-2026-1046.json","unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"last_affected":"6.2.0"},{"last_affected":"5.2.13"}]}],"cna_assigner":"Mattermost"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/1xxx/CVE-2026-1046.json"},{"type":"ADVISORY","url":"https://mattermost.com/security-updates"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-1046"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mattermost/desktop","events":[{"introduced":"b80c7835cd84620601cfe1de7dc50450d12e2ab2"},{"fixed":"c6cb9ed5ca9cab2c181652d27c673b8433a5bb2c"},{"introduced":"dd2c7c4b66d726250980171a113a8764ab8f8777"},{"fixed":"54fe4b55ba0f039d62477616025193b353a9f134"}],"database_specific":{"extracted_events":[{"introduced":"5.13.2"},{"fixed":"5.13.3"},{"introduced":"6.0.0"},{"fixed":"6.0.3"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:mattermost:mattermost_desktop:*:*:*:*:*:*:*:*"}}],"versions":["v5.13.3-rc.1","v6.0.3-mas.1","v6.0.3-rc.1","v5.13.2-mas.1","v5.13.2","v6.0.2-mas.1","v6.0.2","v6.0.2-rc.2","v6.0.2-rc.1","v6.0.1-mas.1","v6.0.1","v6.0.1-rc.2","v6.0.1-rc.1","v6.0.0-mas.1","v6.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-1046.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:L"}]}