{"id":"CVE-2024-24988","aliases":["GHSA-6mx3-9qfh-77gj","BIT-mattermost-2024-24988","GO-2024-2589"],"title":"Mattermost denial of service through long emoji value","summary":"Mattermost denial of service through long emoji value","severity":"medium","cvss":4.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","vendor":"mattermost","product":"github.com/mattermost/mattermost/server/v8","ecosystem":"go","affected":["github.com/mattermost/mattermost/server/v8 >= 9.3.0, < 9.3.1","github.com/mattermost/mattermost/server/v8 >= 9.2.0, < 9.2.5"],"patched":["github.com/mattermost/mattermost/server/v8 9.3.1","github.com/mattermost/mattermost/server/v8 9.2.5"],"published":"2024-02-29","updated":"2026-08-07","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-6mx3-9qfh-77gj","references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-24988"},{"url":"https://github.com/mattermost/mattermost"},{"url":"https://mattermost.com/security-updates"}],"tags":["osv","go"],"epss":0.0068,"epssPercentile":0.50959,"ingestedAt":"2026-08-07T19:14:15.941Z","slug":"CVE-2024-24988","body":"## Overview\n\nMattermost fails to properly validate the length of the emoji value in the custom user status, allowing an attacker to send multiple times a very long string as an emoji value causing high resource consumption and possibly crashing the server.\n\n\n\n## Affected packages\n\n- `github.com/mattermost/mattermost/server/v8 >= 9.3.0, < 9.3.1`\n- `github.com/mattermost/mattermost/server/v8 >= 9.2.0, < 9.2.5`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `github.com/mattermost/mattermost/server/v8 9.3.1`\n- `github.com/mattermost/mattermost/server/v8 9.2.5`","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":23.7,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}