{"id":"CVE-2026-22880","summary":"Mobile SSO authentication flow allows credential theft via malicious server","details":"Mattermost Mobile Apps versions \u003c=2.37 11.4 2.0.37 11.0.4 11.1.3 11.3.2 10.11.11.0 fail to properly validate the SSO authentication callback origin which allows an attacker controlling a malicious Mattermost server to steal user credentials for a legitimate Mattermost server via relaying the SSO code exchange flow through the mobile application. Mattermost Advisory ID: MMSA-2025-00564","modified":"2026-08-12T03:51:12.207049366Z","published":"2026-05-21T08:22:00.182Z","database_specific":{"cwe_ids":["CWE-352"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22880.json","unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"last_affected":"2.0.37"},{"last_affected":"11.0.4"},{"last_affected":"11.1.3"},{"last_affected":"11.3.2"},{"last_affected":"10.11.11"}]}],"cna_assigner":"Mattermost"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22880.json"},{"type":"ADVISORY","url":"https://mattermost.com/security-updates"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-22880"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mattermost/mattermost-mobile","events":[{"introduced":"0"},{"fixed":"545b8e9a4bca07022b756d35a7cd46972b449c75"}],"database_specific":{"cpe":"cpe:2.3:a:mattermost:mattermost_mobile:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"2.37.1"}],"source":"CPE_RANGE"}}],"versions":["v2.37.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-22880.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N"}]}