{"id":"GO-2026-4282","summary":"Mattermost Server is vulnerable to channel invisibility DoS via misformatted post in github.com/mattermost/mattermost-server","details":"Mattermost Server is vulnerable to channel invisibility DoS via misformatted post in github.com/mattermost/mattermost-server.\n\nNOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions.\n\n(If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.)\n\nThe additional affected modules and versions are: github.com/mattermost/mattermost-server before v4.1.2-0.20171013141717-ee57a5829ab1, before v4.2.1-0.20171013140502-b3e4b0ac9168.","aliases":["CVE-2017-18873","GHSA-x6mw-hf2j-vqpc"],"modified":"2026-02-26T18:56:01.453798Z","published":"2026-02-26T16:27:46Z","database_specific":{"url":"https://pkg.go.dev/vuln/GO-2026-4282","review_status":"UNREVIEWED"},"references":[{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-x6mw-hf2j-vqpc"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2017-18873"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/9adaf53e110e0e806b21903111aacb93129668cb"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/b3e4b0ac91682093276a653f7ccd5774aaa9cd06"},{"type":"WEB","url":"https://github.com/mattermost/mattermost/commit/ee57a5829ab162859e0e355dac6cfe6ca1a8f379"},{"type":"WEB","url":"https://mattermost.com/security-updates"}],"affected":[{"package":{"name":"github.com/mattermost/mattermost-server","ecosystem":"Go","purl":"pkg:golang/github.com/mattermost/mattermost-server"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"4.1.2-0.20171013141717-ee57a5829ab1+incompatible"},{"introduced":"4.2.0+incompatible"},{"fixed":"4.2.1-0.20171013140502-b3e4b0ac9168+incompatible"},{"introduced":"4.3.0-rc1+incompatible"},{"fixed":"4.3.0+incompatible"}]}],"ecosystem_specific":{"custom_ranges":[{"events":[{"introduced":"0"},{"fixed":"4.1.2-0.20171013141717-ee57a5829ab1"},{"fixed":"4.2.1-0.20171013140502-b3e4b0ac9168"}],"type":"ECOSYSTEM"}]},"database_specific":{"source":"https://vuln.go.dev/ID/GO-2026-4282.json"}}],"schema_version":"1.7.3"}