{"id":"CVE-2024-39830","aliases":["EUVD-2024-38258","GHSA-vmvm-jjvw-qwpw"],"status":"published","title":"Timing attack during remote cluster token comparison when shared channels are enabled","description":"Mattermost versions 9.8.x \u003c= 9.8.0, 9.7.x \u003c= 9.7.4, 9.6.x \u003c= 9.6.2 and 9.5.x \u003c= 9.5.5, when shared channels are enabled, fail to use constant time comparison for remote cluster tokens which allows an attacker to retrieve the remote cluster token via a timing attack during remote cluster token comparison.","severity":{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00379,"percentile":0.32186,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-203","CWE-287"],"published":"2024-07-03T08:32:56Z","modified":"2026-10-28T02:31:00Z","products":[{"vendor":"mattermost","product":"mattermost"}],"references":[{"url":"https://mattermost.com/security-updates","tags":["x_transferred","Vendor Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-39830","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-vmvm-jjvw-qwpw"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/39xxx/CVE-2024-39830.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2024-39830","title":"Timing attack during remote cluster token comparison when shared channels are enabled","description":"Mattermost versions 9.8.x \u003c= 9.8.0, 9.7.x \u003c= 9.7.4, 9.6.x \u003c= 9.6.2 and 9.5.x \u003c= 9.5.5, when shared channels are enabled, fail to use constant time comparison for remote cluster tokens which allows an attacker to retrieve the remote cluster token via a timing attack during remote cluster token comparison.","status":"published","published":"2024-07-03T08:32:56.113Z","modified":"2024-08-02T04:26:16.02Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:34:19.28149Z"}],"euvd":[{"id":"EUVD-2024-38258","description":"Mattermost versions 9.8.x \u003c= 9.8.0, 9.7.x \u003c= 9.7.4, 9.6.x \u003c= 9.6.2 and 9.5.x \u003c= 9.5.5, when shared channels are enabled, fail to use constant time comparison for remote cluster tokens which allows an attacker to retrieve the remote cluster token via a timing attack during remote cluster token comparison.","status":"published","published":"2024-07-03T08:32:56Z","modified":"2024-08-02T04:26:16Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-03T03:50:17.469599Z"}],"ghsa":[{"id":"GHSA-vmvm-jjvw-qwpw","title":"Mattermost versions 9.8.x \u003c= 9.8.0, 9.7.x \u003c= 9.7.4, 9.6.x \u003c= 9.6.2 and 9.5.x \u003c= 9.5.5, when...","description":"Mattermost versions 9.8.x \u003c= 9.8.0, 9.7.x \u003c= 9.7.4, 9.6.x \u003c= 9.6.2 and 9.5.x \u003c= 9.5.5, when shared channels are enabled, fail to use constant time comparison for remote cluster tokens which allows an attacker to retrieve the remote cluster token via a timing attack during remote cluster token comparison.","status":"published","published":"2024-07-03T18:48:12Z","modified":"2024-07-05T18:34:17Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-203","CWE-287"],"updated_at":"2026-11-02T14:57:38.695929Z"}],"nvd":[{"id":"CVE-2024-39830","description":"Mattermost versions 9.8.x \u003c= 9.8.0, 9.7.x \u003c= 9.7.4, 9.6.x \u003c= 9.6.2 and 9.5.x \u003c= 9.5.5, when shared channels are enabled, fail to use constant time comparison for remote cluster tokens which allows an attacker to retrieve the remote cluster token via a timing attack during remote cluster token comparison.","status":"published","published":"2024-07-03T09:15:07.507Z","modified":"2026-06-17T07:42:52.953Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-287","CWE-203"],"updated_at":"2026-11-02T14:10:10.545705Z"}],"osv":[{"id":"CVE-2024-39830","title":"Timing attack during remote cluster token comparison when shared channels are enabled","description":"Mattermost versions 9.8.x \u003c= 9.8.0, 9.7.x \u003c= 9.7.4, 9.6.x \u003c= 9.6.2 and 9.5.x \u003c= 9.5.5, when shared channels are enabled, fail to use constant time comparison for remote cluster tokens which allows an attacker to retrieve the remote cluster token via a timing attack during remote cluster token comparison.","status":"published","published":"2024-07-03T08:32:56.113Z","modified":"2026-10-28T02:31:00.561135587Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T15:44:41.618074Z"}]}}