{"id":"CVE-2023-5876","aliases":["EUVD-2023-58149","GHSA-p8hg-mm67-hmp8"],"status":"published","title":"Regex DoS from a malicious server enrolled in Desktop","description":"Mattermost fails to properly validate a RegExp built off the server URL path, allowing an attacker in control of an enrolled server to mount a Denial Of Service.","severity":{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00596,"percentile":0.48783,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-400"],"published":"2023-11-02T08:26:01Z","modified":"2026-10-28T02:30:53Z","products":[{"vendor":"mattermost","product":"mattermost desktop"},{"vendor":"mattermost","product":"mattermost_desktop"}],"references":[{"url":"https://mattermost.com/security-updates","tags":["x_transferred","Vendor Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-5876","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-p8hg-mm67-hmp8"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/5xxx/CVE-2023-5876.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2023-5876","title":"Regex DoS from a malicious server enrolled in Desktop","description":"Mattermost fails to properly validate a RegExp built off the server URL path, allowing an attacker in control of an enrolled server to mount a Denial Of Service.\n\n","status":"published","published":"2023-11-02T08:26:01.611Z","modified":"2024-09-05T18:12:06.794Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L","level":"low","assessor":"cna"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:35:16.771348Z"}],"euvd":[{"id":"EUVD-2023-58149","description":"Mattermost fails to properly validate a RegExp built off the server URL path, allowing an attacker in control of an enrolled server to mount a Denial Of Service.\n\n","status":"published","published":"2023-11-02T08:26:01Z","modified":"2024-09-05T18:12:06Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L","level":"low"}],"updated_at":"2026-11-03T00:56:02.678796Z"}],"ghsa":[{"id":"GHSA-p8hg-mm67-hmp8","title":"Mattermost fails to properly validate a RegExp built off the server URL path, allowing an...","description":"Mattermost fails to properly validate a RegExp built off the server URL path, allowing an attacker in control of an enrolled server to mount a Denial Of Service.\n\n","status":"published","published":"2023-11-02T09:30:18Z","modified":"2023-11-09T18:34:55Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L","level":"low"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:54:56.096891Z"}],"nvd":[{"id":"CVE-2023-5876","description":"Mattermost fails to properly validate a RegExp built off the server URL path, allowing an attacker in control of an enrolled server to mount a Denial Of Service.\n\n","status":"published","published":"2023-11-02T09:15:08.747Z","modified":"2026-06-17T06:49:34.373Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L","level":"low","assessor":"secondary"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:08:41.047232Z"}],"osv":[{"id":"CVE-2023-5876","title":"Regex DoS from a malicious server enrolled in Desktop","description":"Mattermost fails to properly validate a RegExp built off the server URL path, allowing an attacker in control of an enrolled server to mount a Denial Of Service.\n\n","status":"published","published":"2023-11-02T08:26:01.611Z","modified":"2026-10-28T02:30:53.100506756Z","cvss":[{"version":"3.1","score":3.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L","level":"low"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T15:44:36.851042Z"}]}}