{"id":"EUVD-2026-30755","revision":"7c446db38b304598b5dd98b4c571439d","records":[{"revision":"7c446db38b304598b5dd98b4c571439d","observedAt":"2026-11-07T13:29:23.956+00:00","statement":{"source":"euvd","id":"EUVD-2026-30755","aliases":["CVE-2026-6333","GHSA-vqp5-2mrp-qqxg"],"title":"Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to validate the Host header when constructing response URLs for custom slash commands which allows an authenticated attacker to redirect slash command responses to an attacker-c…","description":"Mattermost versions 11.5.x <= 11.5.1, 10.11.x <= 10.11.13 fail to validate the Host header when constructing response URLs for custom slash commands which allows an authenticated attacker to redirect slash command responses to an attacker-controlled server via a spoofed Host header.. Mattermost Advisory ID: MMSA-2026-00582","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N","score":3.5,"severity":null}],"references":["https://mattermost.com/security-updates"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-30755","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"May 18, 2026, 8:41:29 AM","dateUpdated":"May 19, 2026, 5:19:42 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-30755","identifiers":["EUVD-2026-30755","CVE-2026-6333","GHSA-vqp5-2mrp-qqxg"]},"retained":false,"historicalAffected":[]}],"coverage":[]}