{"id":"CVE-2023-5196","summary":"DoS via Channel Notification Properties","details":"Mattermost fails to enforce character limits in all possible notification props allowing an attacker to send a really long value for a notification_prop resulting in the server consuming an abnormal quantity of computing resources and possibly becoming temporarily unavailable for its users. \n\n\n\n","aliases":["GHSA-33r7-wjfc-7w98"],"modified":"2026-08-12T03:51:25.430457394Z","published":"2023-09-29T09:22:36.286Z","database_specific":{"unresolved_ranges":[{"extracted_events":[{"last_affected":"7.8.9"},{"introduced":"8.1.0"},{"last_affected":"8.1.0"},{"last_affected":"8.0.1"}],"source":"AFFECTED_FIELD"}],"cna_assigner":"Mattermost","cwe_ids":["CWE-400"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/5xxx/CVE-2023-5196.json"},"references":[{"type":"WEB","url":"https://mattermost.com/security-updates"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/5xxx/CVE-2023-5196.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-5196"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mattermost/mattermost","events":[{"introduced":"70da7adaff636f074316d05e0b4408f0721eee7b"},{"fixed":"ccceee77061add55f4ff849d5505fdb3e46b30e2"},{"introduced":"90f502dc2dc80ee25cfb7d7bc3e743b53564a5a7"},{"fixed":"48cfe92a04105e63b5fdfc68e3914e0b3910b676"},{"introduced":"096c9ea12a2144f832e330e9a0f4d3862ca20b9f"},{"fixed":"69a5120ae293c9e6e3e1109bc3f02d7b659e60d9"}],"database_specific":{"source":"CPE_RANGE","cpe":"cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"7.0.0"},{"fixed":"7.8.10"},{"introduced":"8.0.0"},{"fixed":"8.0.2"},{"introduced":"8.1.0"},{"fixed":"8.1.1"}]}}],"versions":["v8.0.2-rc2","v8.1.1-rc1","v8.1.0-rc2","v8.1.0","v8.0.1","v8.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-5196.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:N/I:N/A:H"}]}