{"$ref":"https://www.cert.ssi.gouv.fr/openapi.json","affected_systems":[{"description":"Mattermost Server versions 11.3.x ant\u00e9rieures \u00e0 11.3.3","product":{"name":"Mattermost Server","vendor":{"name":"Mattermost","scada":false}}},{"description":"Mattermost Server versions 11.4.x ant\u00e9rieures \u00e0 11.4.3","product":{"name":"Mattermost Server","vendor":{"name":"Mattermost","scada":false}}},{"description":"Mattermost Server versions 10.11.x ant\u00e9rieures \u00e0 10.11.13","product":{"name":"Mattermost Server","vendor":{"name":"Mattermost","scada":false}}},{"description":"Mattermost Server versions 11.5.x ant\u00e9rieures \u00e0 11.5.1","product":{"name":"Mattermost Server","vendor":{"name":"Mattermost","scada":false}}},{"description":"Mattermost Server versions 11.2.x ant\u00e9rieures \u00e0 11.2.3","product":{"name":"Mattermost Server","vendor":{"name":"Mattermost","scada":false}}}],"affected_systems_content":"","content":"## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l'\u00e9diteur pour l'obtention des correctifs (cf. section Documentation).","cves":[{"name":"CVE-2026-4265","url":"https://www.cve.org/CVERecord?id=CVE-2026-4265"},{"name":"CVE-2026-4274","url":"https://www.cve.org/CVERecord?id=CVE-2026-4274"}],"links":[],"reference":"CERTFR-2026-AVI-0300","revisions":[{"description":"Version initiale","revision_date":"2026-03-17T00:00:00.000000"},{"description":"Ajout du bulletin de s\u00e9curit\u00e9 Bulletin de s\u00e9curit\u00e9 Mattermost MMSA-2026-00574.","revision_date":"2026-03-18T00:00:00.000000"},{"description":"Ajout r\u00e9f\u00e9rence CVE CVE-2026-4274","revision_date":"2026-03-27T00:00:00.000000"}],"risks":[{"description":"Non sp\u00e9cifi\u00e9 par l'\u00e9diteur"},{"description":"Contournement de la politique de s\u00e9curit\u00e9"}],"summary":"De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans Mattermost Server. Elles permettent \u00e0 un attaquant de provoquer un contournement de la politique de s\u00e9curit\u00e9 et un probl\u00e8me de s\u00e9curit\u00e9 non sp\u00e9cifi\u00e9 par l'\u00e9diteur.","title":"Multiples vuln\u00e9rabilit\u00e9s dans Mattermost Server","vendor_advisories":[{"published_at":"2026-03-16","title":"Bulletin de s\u00e9curit\u00e9 Mattermost MMSA-2026-00574","url":"https://mattermost.com/security-updates/"},{"published_at":"2026-03-16","title":"Bulletin de s\u00e9curit\u00e9 Mattermost MMSA-2026-00625","url":"https://mattermost.com/security-updates/"},{"published_at":"2026-03-16","title":"Bulletin de s\u00e9curit\u00e9 Mattermost MMSA-2026-00603","url":"https://mattermost.com/security-updates/"},{"published_at":"2026-03-16","title":"Bulletin de s\u00e9curit\u00e9 Mattermost MMSA-2025-00553","url":"https://mattermost.com/security-updates/"},{"published_at":"2026-03-16","title":"Bulletin de s\u00e9curit\u00e9 Mattermost MMSA-2026-00624","url":"https://mattermost.com/security-updates/"}]}