{“lastseen”:””,”description”:”Mattermost versions 11.6.x \\u003c= 11.6.0, 11.5.x \\u003c= 11.5.3, 11.4.x \\u003c= 11.4.4, 10.11.x \\u003c= 10.11.14 fail to check integration URL for path traversal which allows an malicious authenticated user to call an arbitrary API via system admin Mattermost auth token using via path traversal in integration action URL.. Mattermost Advisory ID: MMSA-2026-00640″,”published”:”2026-05-21T08:12:11.176Z”,”modified”:”2026-05-21T08:12:11.176Z”,”type”:”cve”,”title”:”Path traversal in integration action URL leading to arbitrary API execution via system admin\u2019s auth token.”,”source”:”Mattermost”,”references”:”https:\/\/mattermost.com\/security-updates”,”id”:”CVE-2026-4858″,”bulletinFamily”:””,”cwe”:[“CWE-22″],”cvelist”:null,”sourceData”:”Mattermost Mattermost 11.6.0\\nMattermost Mattermost 11.5.0\\nMattermost Mattermost 11.4.0\\nMattermost Mattermost 10.11.0″,”sourceHref”:””,”cvss”:{“score”:8,”severity”:”HIGH”,”vector”:”CVSS:3.1\/AV:N\/AC:H\/PR:L\/UI:R\/S:C\/C:H\/I:H\/A:H”,”version”:”3.1″},”cvss2″:{},”cvss3″:{“version”:””,”vectorString”:””,”baseScore”:0,”baseSeverity”:””,”attackVector”:””,”attackComplexity”:””,”privilegesRequired”:””,”userInteraction”:””,”scope”:””,”confidentialityImpact”:””,”integrityImpact”:””,”availabilityImpact”:””,”cvssV3″:{“version”:””,”vectorString”:””,”baseScore”:0,”baseSeverity”:””,”attackVector”:””,”attackComplexity”:””,”privilegesRequired”:””,”userInteraction”:””,”scope”:””,”confidentialityImpact”:””,”integrityImpact”:””,”availabilityImpact”:””}},”href”:””,”category_name”:”CVE”,”post_link”:””,”product”:”Mattermost”,”version”:”11.6.0″,”vendor”:”Mattermost”,”ai_description”:””,”ai_severity”:””,”ai_vendor”:””,”ai_product”:””,”ai_version”:””,”ai_score”:0}<\/p>\n","protected":false},"excerpt":{"rendered":"
{“lastseen”:””,”description”:”Mattermost versions 11.6.x \\u003c= 11.6.0, 11.5.x \\u003c= 11.5.3, 11.4.x \\u003c= 11.4.4, 10.11.x \\u003c= 10.11.14 fail to check integration URL for path traversal which allows an…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[6,8,83,12,15,13,7,11,5],"class_list":["post-56044","post","type-post","status-publish","format-standard","hentry","category-category_cve","tag-cve","tag-cvss","tag-cvss-80","tag-exploit","tag-high","tag-news","tag-security","tag-tapic","tag-vulnerability"],"yoast_head":"\n